trek road bike madone

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Trek Madone Gen 8 SL7: First ride review

Trek's new madone supersedes its aero champion and kills off the emonda altogether - so is this one bike to rule them all.

Early Verdict

The new Madone has big shoes to fill by replacing two of the most impressive bikes on the market, but initial impressions indicate it's done just that

Fantastic ride quality and comfort

Rigid in power transfer and handling

Stunningly light

A blisteringly fast bike

The accompanying water bottles may take some getting used to

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It’s hard to conjure a bike more iconic to pro cycling than the Trek Madone. The Madone was born out of the glory years of Lance Armstrong’s now-shamed successive Tour de France wins, and named after his key training climb – the Col de la Madone. But the Trek Madone achieved the rare feat of surviving the Texan’s fall from grace and living on independently with its own unique legacy. 

The Madone Gen 8 is arguably the most true-to-nature version of Trek’s flagship racer since its original iteration - combining the aerodynamics of the previous Madone with the lightweight design of the Emonda and doing away with the latter model altogether in the process. It brings Trek’s entire performance road bike line back to basics - the Domane is still there for the comfort-cum-cobble market, but the Madone is now Trek’s one and only flagship racer. In the years before the dedicated aero bike, that was the norm, and Trek claims to have returned to that with no downside.

Trek claims that the new Madone SLR hits a frame weight of 765g and a fork weight of 370g, making it the same weight as the outgoing Emonda. It also manages that while exceeding the aerodynamics performance of the previous aero-focussed SLR - by a slender 0.1 watt at 22mph (and marginally faster all the way up to 40mph).

With its shift back to narrow tubes and lightweight performance, alongside the end of the Emonda, it seems fitting to pull back and take a look at how the Madone evolved to reach this latest and perhaps most complete iteration.

The Trek Madone - from the start and back again

Originally billed as an aerodynamic lightweight racer in 2003, it didn't dazzle in weight terms and aerodynamics was limited to a fin on the seat tube. The bike arguably didn’t disrupt that status quo until its second iteration in 2007, and in 2009 came a sub 900g OCLV masterpiece in the bike’s third and most iterative design. However, it still looked, largely, like a bike.

In 2015 that was no longer the case, as Trek unveiled a new Madone which completely transformed the genre. In (unintentional) sync with the launch of the Specialized Venge Vias, the Madone 9 series was the first road bike to completely conceal its front cabling – making the front of the bike completely clean with the help of integrated Bontrager brakes developed specifically for the Madone. To facilitate that, the headtube of the bike had retractable carbon flaps which would open when the handlebars were moved to an acute enough angle, in order to let the brakes pop out from within the headtube.

This was a truly unhinged design (albeit with actual hinges) which offered a seismic leap in aerodynamic performance and overall speed - I attended the launch in 2015 and assumed I was suffering from jetlag delirium. The weight suffered as a result of the aero design. That was exacerbated by the IsoSpeed decoupler on the seatpost which compensated for the harsh aero tubes. In the era of rim brakes and early aerodynamic advances, though, overall weight being a kilo over the UCI minimum weight limit was nothing compared to the enormous watt savings. 

Since then, the Madone developed an adjustable IsoSpeed and gained disc brakes which negated the carbon flaps, before gradually converging back toward a more all-around bike. The 2022 update of the Madone sided for lighter weight at the expense of the IsoSpeed, providing instead an exhaust-like cantilever chasm in the seat tube known as the IsoFlow - still present in the design of the Madone Gen 8.

Indeed, having already taken a step toward being an all-around racer, the Gen 8 looks like the last generation Madone has been on a diet with thinner tubes, radically reshaped for aerodynamics and comfort, all powered by improved 900 OCLV Carbon – Trek’s proprietary blend of carbon fibre.

On the whole, though, Trek’s goal was clearly to make an irrefutably fast bike, which wins both on the ascents, descents and solo into the wind.

More of everything

“To our knowledge this is one of the if not the fastest road race bike that exists within the professional peloton and in the market,” says Jordan Roessingh, Director of Road bikes at Trek. 

“When you're comparing both attributes [weight and aero] of either previous platform, it's 77 seconds per hour faster than Emonda. So that's an enormous difference in aerodynamic performance compared to the previous Emonda despite the fact it's the same weight.” 

The real sell is that the new Madone nails the Emonda’s weight while matching the previous Madone’s aerodynamics. “When you're comparing to a Madone, it's the exact same aerodynamic performance,” Roessingh says. “But 320g lighter – so an enormous weight saving between those two. So again, we're taking the best of both worlds here and merging them and still achieving the highest performance of both attributes.”

The new tube shapes play a big role in the lower weight, better ride and claimed aero benefits. It’s odd as the cross-sections of the aero tubes look blunt and devoid of aerofoil or Kamm-tail shaping. However, when taken as a whole system, sandwiched between a horizontal cross-section of the front rim profile, aero bottles and the rear bottles, the tubes form a sort of neat holistic aerofoil.

Said with almost a grimace, as it’s become an industry cliche, Trek boasts that the bike has better vertical compliance alongside more lateral stiffness. The central IsoFlow seat tube gap claims an 80% improvement in the Madone’s vertical compliance and a 24% improvement over the IsoFlow-less Emonda.

The new Madone carries over the same splayed integrated bar concept as the Gen 7 - positioning the rider 2cm inward on the hoods compared to the drops for aero gains while sitting on the hoods (which has increasingly become the standard aero position).

Strangely, Trek claims the handlebars are less aerodynamic than the Gen 7 iteration, but with a wider cross-section offer a better overall aero performance when air interacts with the bars and then the rider.

In another gravel-like nod to versatility, the new Madone has clearance for 33mm tyres - up from 28mm on the previous Madone. Trek argues that the previous Madone could have handled 30mm or larger in most rim combinations, and for the Gen 8, similarly, 33mm is a conservative estimate. We can believe that given the visible clearance.

Sizing, spec and bottled-up speed

Trek’s aero bottle design is intriguing because this is ground that the bike market had trodden before. Aero water bottles have been commonplace in triathlon and time trial for over a decade, and have crept up into the build of aero road bikes from time to time but never managed to break through.

It’s also intriguing because the Madone is slower than its previous iteration with round bottles. What’s more, without any bottles on the bikes at all, it’s slower - so no ditching your bottles at the base of the climb.

Given the fixation on aero gains, it’s surprising that the claimed 3.7-watt gains with Trek’s RSL water bottles haven’t been adopted across the peloton. In reality, though, aero bottles present a few issues. Typically the aero cages restrict the use of round bottles, while any minor challenge in liberating a bottle is a big issue to a WorldTour rider on a critical climb. Trek claims to have solved both of those problems. 

“These bottle cages are compatible with round bottles” explains Adam Bird, Trek’s Design Engineer for the Madone. “So from a practical perspective, it's something that we expect the pro riders to be trying at the Tour de France – they're actually intending on using aero bottles at the tour. But they need to be able to grab any water bottle from any team or any neutral service and be able to put it in there. So we're balancing the aerodynamic performance with practical performance.”

In terms of breaking through to riders in the WorldTour where in the past the idea may have been dismissed as impractical, Bird argues, "There's a difference in the rider mentality… a lot of the riders now in the peloton are really young. They're very interested in learning about all those slight performance gains that they could potentially find.”

“Ten years ago, we would have shown them this water bottle and they would be like: screw off! There's no way we're gonna practically try them in a peloton. Three Watts? We don't really care about that.”

The proof of concept will be in whether Lidl-Trek riders commit to these bottles throughout the Tour - a piece of minutiae of team tech which I’ll personally be following closely.

The bottles are still not able to be stacked upright, given their angular nature. So don’t pop it on a table ready for a refill.

The change is a bold one given the cycling community’s aversion to change, and for now will be shipped as standard only with SLR – the bottles will be an add-on for lower-tier SL bikes (hence making them comparatively slower than the outgoing Madone SL).

The new Madone is set to go from a 105-equipped SL5 for £3,250.00 ($3,499.99) to a £14,700 ($16,999.99) Madone SLR 9 AXS P1 (Interstellar) with the only deviation in the frame itself being 500 series OCLV in the SL vs new 900 series OCLV in the top-tier SLR. The SLR is also compatible only with electric drivetrains.

Interestingly, the overall offering has shrunk from eight sizes to six.

“We had a lot of sizes that had a lot of overlap,” Roessingh explains. “Many riders could actually ride two different sizes and that created some confusion of just what frame size to ride, as there were some that were like unbelievably close to each other.” In some cases as little as a 4mm difference in stack height.

The fewer sizes are billed as reducing confusion and consolidating the design of each size. The cynic in me naturally assumed that there was perhaps some manufacturing saving at work there, but Roessingh later walked me through some of the logistics of manufacturing on the scale needed for the Madone. Essentially, reducing eight moulds to six may offer substantial savings for a small frame manufacturer, but when selling thousands of frames per year the turnaround of worn moulds means fewer mould sizes doesn’t necessarily mean fewer moulds.

First ride impressions

Trek’s global launch took place near Cebreros in a mountainous corner of the Castile and León region in Spain. Our riding took us directly into the mountains and into open windy plains. 

I was riding the second-tier (Ultegra Di2-equipped) SLR 7, though it was identical to the top-spec SLR 9 as far as the frame design and material. No surprise, then, that there was an immediate sense of speed, power transfer and sharpness riding the Madone.

The previous aero-focussed Madone always excelled in comfort, however, its bulky tubes ultimately gave it the sensation of driving a beefy sports car, while the new SLR not only felt palpably lighter but seemed so much closer to the Emonda in general ride quality. This has the sharp turn of speed and lively handling of a lightweight climber while promising the same speed as an all-out aero machine.

When it comes to all-out speed, it’s very hard to quantify that through a pair of initial test rides. Perhaps the best I could say is that it carried speed well on flat terrain, and at times felt simply blisteringly fast, and was truly a beast on the descents.

It has been too long since I’ve been on a long alpine descent, and despite the relatively shallow inclines, I found myself happily edging toward 80kph. The Madone definitely dared me to take more speed into corners, with a rigid handling character and sat extremely steadily at high speed. 

While I always rated the IsoSpeed system for its abundant comfort, the slight detachment between the front and back of the bike with the 9 series was a bit of a sacrifice for the resulting ride quality. With the IsoFlow system, I didn’t notice any discomfort or bumps on the rear end that I felt needed to be filtered out, and the reward in weight and connection to the road was palpable.

The finishing kit tweaks were probably the most surprising element of my first ride. The squeezed-in handlebar hoods make so much sense. The slight splay in a bar has long been a trend in gravel - offering the wider drops for stability and the narrow for speed. It works very well on the Madone and I was left wondering why we ever bother with hoods that are 42cm apart. 

The bottles, despite my scepticism, were easy to handle and never once a hassle to stow or release from the cage.

Early verdict

While I’ve only had a fleeting ride experience with the Madone, my first impression is this is a bike that really shows the maturity of cycling tech at its best. While it’s common to chase wattage gains from minor frame changes, Trek is right to focus on the bike holistically from an aero perspective, where a saving of 3 watts on the bottles could eclipse huge cost and weight gains if those same aerodynamic margins were sought on the frame.

Meanwhile to hit 7kg (in the top-spec SLR 9) with range-topping aerodynamic and stiffness performance is something we didn’t dream of with a disc brake road bike even five years ago. That comes with the benefits of wider tyres and a better experience across climbing, descending and sprinting, alongside great comfort.

With that in mind, the new Madone is very much the everything race bike, but one that could bridge that considerable gap between the needs of the WorldTour’s best and the normal enthusiasts.

I’m excited to spend more time with it, and where this new direction will take one of the most storied bikes in cycling’s history.

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Peter Stuart has been the editor of Cyclingnews since March 2022, overseeing editorial output across all of Cyclingnews' digital touchpoints.

Before joining Cyclingnews, Peter was the digital editor of Rouleur magazine. Starting life as a freelance feature writer, with bylines in The Times and The Telegraph, he first entered cycling journalism in 2012, joining Cyclist magazine as staff writer. Peter has a background as an international rower, representing Great Britain at Under-23 level and at the Junior Rowing World Championships.

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Meet the new Trek Madone

Our fastest road bike ever. Period.

The holy grail of road bike engineering is a perfect balance of aerodynamics, light weight and comfort. With the seventh generation of the Trek Madone, the mad scientists at Trek’s laboratories may have finally found the sweet spot for what we can proudly, and unequivocally, call our fastest road bike ever.

The secret is hiding in plain sight. Each frame is sculpted with IsoFlow technology, which splits the seat tube, creating a funnel beneath the seat mast that smooths and accelerates air through the frame while also creating flex near the saddle to smooth out those bumps in the road, so you can ride even farther. 

IsoFlow is both eye-catching and revolutionary. You can see it at work already for the Trek-Segafredo men’s and women’s teams at some of the biggest races of the year, including the Tour de France. If you love speed, you’re going to love this bike.

The full bike and a good look at IsoFlow.

A cockpit built for speed.

Trek engineers didn’t stop at IsoFlow to improve the Madone’s aerodynamics. Painstaking research went into the frame, cockpit and rider position to make sure that riders got every ounce of free speed possible. The result? The new Madone is 19 watts faster than the previous generation at 45 kilometers an hour. That’s a savings of approximately 60 seconds per hour. 

A split seat post helps eat bumps in the road.

A more comfortable position means longer games of "tag."

Power, comfort and control

Riders are now placed in an even more ergonomic riding position compared to the previous Madone, thanks to an overhauled cockpit that features a shorter reach and hoods that are 3 centimeters narrower than the drops. Combined with IsoFlow, riders can expect to feel faster late into their long efforts.

Climb or descend like the best.

Lighter than ever

It may not beat the mountain-eating Émonda , but the new Madone has always been plenty snappy on steep gradients, and it’s even more so now. The new Madone is around 300 grams lighter than the previous version, again thanks to IsoFlow, as well as our best and lightest OCLV Carbon. Take on your hometown’s killer climb (you know the one) without fear.

No detail overlooked.

Coming to a peloton near you.

You want a lighter, faster, more comfortable road bike? Well here it is. The Madone compromises nothing to give you the ultimate ride. There’s simply nothing like it. 

Our fastest road bike ever

Discover more.

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• Madone SLR 6 AXS Gen 7

"Every inch an aero race bike"

"One of the most visually striking and competent aero bikes available today...More aero, less weight, less complication."

"Revolutionary"

"The brand new Trek Madone comes with a revolutionary design, but retains the neat and powerful look of its previous iterations."

"Ticks all of the boxes"

"The new design ticks all of the requisite boxes for top-tier road racing machines: Lighter-weight, more aerodynamic, and more integration."

"Lighter than ever"

"The most significant new bike to be seen [at the Tour de France] thanks to its radical aero design"

Which generation is right for you? 

Keep speed smooth with Madone Gen 6’s IsoSpeed vibration-damping tech, or go next-level with Gen 7’s aero and comfort-boosting IsoFlow.

Service manual

Time to bust out the repair stand for some maintenance? Find a detailed breakdown of your bike with part numbers, torque values, and platform-specific tech instructions below.

Join cycling’s most exclusive club 

Get incredible benefits, like concierge support and a private tour of Trek Headquarters, when you purchase any Project One or SLR level road bike.

Madone goes green at La Vuelta

After three grueling weeks (and three stage wins), Mads Pederson wins the green jersey aboard a custom-painted Madone SLR at Vuelta.

Designing for speed

Trek's lead aerodynamicist breaks down the science behind our fastest road race bike ever.

World Champ Pedigree

Madone is the bike of choice for Mads Pedersen, UCI Road World Champion.

The always-on team

Research shows the single most impactful measure you can take to stand out to motorists is to use front and rear Daytime Running Lights. The team uses them on every training ride, any time of day—and they’ve found that these lights truly make a difference.

Product features

Unprecedented aerodynamics.

All-new aerodynamic Kammtail frame shapes, bar/stem design, and rider position make Madone SLR our fastest road race bike yet.

Exclusive IsoFlow technology

Never before seen IsoFlow technology specifically designed for the 7th generation Madone SLR shaves weight, improves aerodynamics, and smooths your ride.

Our lightest Madone disc ever

Super lightweight 800 Series OCLV Carbon and a new lightweight design make this our lightest Madone disc ever.

New ergonomic bar/stem

A newly optimized bar/stem that’s 3cm narrower in the hoods than the drops offers a more comfortable and ergonomic riding position for faster racing, improved aerodynamics, and ultimate control. Use the same bar/stem size you’re used to – if you normally ride with a 42cm bar/stem, opt for 42cm in the drops and 39cm in the hoods.

Refined integration

Every element of this bike is part of a greater whole. It has invisible cable routing, aero cockpit, hidden seatmast, and more.

Integrated power meter

This bike helps you get the most out of every ride with a SRAM power meter that measures your input and provides accurate data, allowing you to track your progress and tailor your training to crush your goals.

Don’t forget your pedals

This bike doesn’t come with pedals because you’ll have a better time on your new bike if you choose your own. See the pedal guide to find the best pedals for your riding style. We recommend clipless road pedals for control and efficiency.

Invisible cable routing

The brake and shift cables of the most aerodynamic bike are routed through the frame for the ultimate in sleek, aerodynamic performance.

Carbon Care Wheel Loyalty Program

Every set of Bontrager carbon wheels is backed by the Carbon Care Wheel Loyalty Program. In the unlikely event that you damage your Bontrager carbon wheels within the first two years of ownership, we’ll repair or replace them for free.

Project One

Don't settle for anyone else's bike. Create your very own with Project One, Trek's custom bike program.

Blendr stem

Bontrager stem technology lets you clip your gear directly to the stem for clean looks, maximum user friendliness.

H1.5 geometry, developed with Trek-Segafredo pro cycling teams, puts the rider in the optimal aero race position. It’s the sweet spot for what our racers want.

Warrantied for life

Carbon wheels can lighten your ride and improve your performance—and when you ride Bontrager, your investment is protected. All Bontrager carbon wheels are backed by a lifetime warranty for the original owner.

How tall are you?

To measure your height, stand straight up, barefoot, with your back, heels, shoulders and head all touching a wall. While looking straight ahead, place a book or straight edge on your head and slowly push it against the wall. Your straight edge should be parallel with the floor. Mark the spot where the bottom of the book is touching the wall. The distance from the marked spot to the floor is your height.

What is your inseam?

How to measure: Stand barefoot with your back straight and against a wall. Tuck a ruler or something that extends to the floor between your legs. Using both hands, and keeping it level, pull the ruler up into your crotch as if you were sitting on the saddle. Measure the distance from the top edge of the ruler to the ground to find your inseam measurement. Your inseam is very important to your final bike size so please measure carefully.

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Shop new & used Trek Madone bikes at TPC - The Pro's Closet. Find reviews, specs, weight info, prices and size charts on various models (SLR 9, 7) and popular years (2018, 2021, etc). Read our Trek Madone Quick-Take Review below.

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Trek Madone SLR Gen 7 - Weight, Specs, Price

Trek madone 3rd party reviews ,   trek madone size chart, 2022 trek madone review - a tpc rider's quick take.

• Aero masterclass
• Trek engineers locked themselves in a wind tunnel with this bike. Every curve, edge, and component shouts aerodynamics. From the IsoFlow tech to the one-piece aero bar and stem this bike is designed for slicing through air.
• IsoFlow Comfort
• One of the standout features of the Madone is Trek’s IsoFlow technology, which makes for a forgiving ride, especially on longer epics. IsoFlow helps the seatmast flex, soaking up road vibrations. It’s rare for a speed-focused road bike to excel in comfort, yet here we are.
• Integrated everything
• In the Madone, the term "fully integrated" is taken to new heights. From the cables to the cockpit, everything is tucked away, contributing not just to aerodynamics but also to a jaw-dropping aesthetic.
• Speed and beauty come at a cost. The Madone’s premium price could act as a barrier for many. It's a serious investment, and budget-friendly aero options are out there.
• Price: $7,999 (SLR 6)
• Weight woes
• Despite the carbon fiber frame and components, the Madone isn't a featherweight in its category. It's a solid build, but riders focused on climbing might find it a tad on the heavier side.
• Weight: 17lbs (56cm)
• Versatility questions
• While the Madone excels on flat terrain and downhill blasts, it's not the most versatile option for a wide range of riding conditions. Climbers and those who encounter varying terrain may find it limiting.

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Trek Madone SL 7 Gen 7 bike review: IsoFlow + burrito is a perfect match

The trek madone sl gen 7 now completes the line matching the more expensive slr and offers almost the same ride quality..

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It’s been almost exactly one year since Trek launched the Madone SLR Gen 7 with the IsoFlow seat tube cutout. Trek is finally releasing an SL version that is said to maintain many of the same bold claims but with a lower price tag. The Trek Madone SL Gen 7, in a way, completes the Madone Gen 7 lineup since, for the last year, if you wanted the latest Madone frame design, you had to shell out over $8000 for an SLR.

The differences are subtle, but the most impactful is the new Trek Madone SL Gen 7 uses Trek’s 500 series OCLV carbon. Really, that means it is a slightly heavier composite that adds weight but also increases durability. The Trek PR for the new Gen 7 SL is claiming “nearly 300 grams lighter than the bike that came before it.” However, on the weight spec sheet, they claim 1676 grams for a painted frame and fork, while the Trek website says the Gen 6 SL frameset is 2120g. That is a difference of 444 grams.

No matter which way you look at it, they have cut weight. My size 56 Madone SL 7 Gen 7 test bike hit the scale at 17.68 pounds. It is the higher spec of the two versions offered. Trek said they have decided to consolidate models for this generation and are only offering the SL with either Shimano Ultegra or 105. It is also worth noting that the frameset is electronic shifting compatible only.

The next biggest difference from the SLR is that the SL uses the Bontrager flared RSL aero handlebar along with the RCS Pro stem rather than the one-piece cockpit. This means the brake hoses are exposed as they leave the headtube and under the stem. If I am being completely honest, I prefer this two-piece option, and it makes it much easier to adjust fit. Not to mention that shipping the bike or airline travel bike bags is much easier to fit into.

What’s the deal with IsoFlow?

Trek is claiming two major things with the under-seatpost opening. First is improved airflow, and the other is comfort. While airflow is hard to validate without a wind tunnel and a lot of calculations, comfort is something we can all experience. Beyond that, Trek says that IsoFlow is tuned to balance aerodynamics, weight, and comfort across all frame sizes. For me, it seems like the best place to put a burrito for the spin back home after a solid ride.

This unique design is where I found myself in a tough position. The seatpost only offers 6.5cm of adjustment up and down. Trek offers two seatpost lengths, meaning that each size technically has a 10cm adjustment. I received the longer of the two seat posts, and it seems that the claimed lowest height for a size 56 is about 5mm higher than the geometry sheet says.

With limited time between receiving the bike and its launch date, I let a few of my trusted riding mates have a go on it since they are a bit taller than me. I did have a few rides on it using my offroad pedals and shoes since they have a taller stack. The saddle was still a bit higher than I prefer, but I agree with the feedback that I received from the others.

The Ride Experience

The Trek Madone SL 7 Gen 7 is, without a doubt, a performance bike with performance geometry. While that can mean a lot of different things to different people, The SL uses the same race-oriented H1.5 geometry as the SLR. For us, it is responsive but not hyper-responsive. This makes riding in groups easy while also allowing an experienced rider the ability to push the limits in corners.

Less experienced riders will still enjoy the stability and predictability of the bike, but if a mistake is made, you will know it. This sort of modern performance geometry makes race bikes much more versatile and fun for the general rider, and in my opinion, is a great balance for most riders looking for a performance feel from a road bike.

The overall feel of the bike is fast, but the Madone SL seems to do a pretty good job of muting the road feedback. Bigger road imperfections are still impactful and a bit jarring. I normally like a bike with these aspects, but for some reason, there is still a mentality in the performance road segment that if it’s comfortable and smooth, then it’s slow. The Madone seems to balance this fine line well.

Cornering is responsive yet stable at both high speeds and slower, more technical twists. At 17.68 pounds, it’s not super light, and you feel it most when you are on very twisty roads that require you to quickly transition from a hard left curve to a hard right curve. The bike feels stable, but the weight seems to labor the transition.

You also feel the weight when you are climbing, especially out of the saddle. Don’t get me wrong, it climbs well, but at almost 18 pounds with pedals and all the rest, it’s not a featherweight.

The lateral stiffness and pedaling efficiency seem very good, so a lighter set of wheels would probably transform the entire ride. The stock Bontrager Aeolus Pro 51 wheels have a claimed weight of 1600 grams. That isn’t bad for wheels this deep, but I have a feeling that is a wheelset weight that is not ready to ride and will still need rim tape. If you want to go tubeless, you will need to purchase valves separately and get tubeless-ready tires.

The Good and Bad

As we look closer into the specs of the bike, there are some key aspects that I like and don’t like. First and foremost, I like that Trek has included the required headset cover in the headtube measurement on the geometry chart. The carbon frame measures 13.4cm, but with the cover, it’s 15cm. It seems like a small detail, but I appreciate it.

The next is that just like the SLR, Trek is using a T47 threaded bottom bracket. Historically, Trek used a proprietary bottom bracket that complicated getting parts and fitment. The T47 interface is dependable, easy to work on, and has extensive compatibility. Once again, it’s not a game changer, but the small things make all the difference.

My seatpost length and fitment issues aside, the interface and adjustment of the seatpost is easy. Trek explicitly says not to use carbon grease on the post, and we haven’t had any issues. The wedge system is retained by the seatpost, so no worry of dropping it into the frame. The simple 4mm Allen tool through the slot in the frame means that even a compact saddle bag tool could be used.

Okay, now for the not-so-good. Trek is one of the largest bicycle brands, but they are missing a few key aspects when it comes to a bike performance bike at this level. $5,500 and $6,500 is a lot of money, at least in my household, for a bike. So why are the tubeless wheels that come on both of the SL models not complemented with tubeless tires? This is a performance bike, and road tubeless has been proven to be the fastest choice.

Sure, the Madone SL 6 Gen 7 comes with Bontrager Aeolus Elite 50 wheels that only have an internal width of 19.5mm, but they are tubeless-ready. The version I am testing comes with the Bontrager Aeolus Pro 51 wheels with a 23mm internal width. Why is it that Trek is pairing both models with the non-tubeless Bontrager R3 Hard-Case Lite tires in size 25c and tubes in 2023-2024? The bikes don’t even get shipped with the tubeless conversion parts.

While I like the idea of consolidating the Madone line, why is there no SRAM build? All of the SLR SRAM builds come stock with a power meter. I think that is a huge added value, and all of the Shimano bikes are missing it. Even partnering with someone like Stages or, better yet, the new 4iiii Precision 3+ power meter with integrated Apple Find My tracking for all of the Shimano bikes.

Overall, There isn’t a lot of “new” with the Trek Madone SL Gen 7, and that is fine. Since the SLR version has had a year in the wild, there have only been a few isolated issues, making it a great platform for the SL level. I love that it has a two-piece bar and stem combo, but I am disappointed that Trek isn’t supporting road tubeless out of the box.

The Madone SL and SLR are competing in a very competitive road segment. The aero-refined bikes remain a top choice for consumers of all levels, and while I can’t say this is a favorite, the simple seatpost adjustment does bump it up on my list. Plus, unlike many of its competitors, almost any 31.8 stem or cockpit will work, major bonus points.

Weight: 17.68 lb, actual weight, 56 cm size, without pedals Price: US$6,499.99 / AU$10,299.99 / £7,500.00 trekbikes.com

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Trek’s Seventh Generation Madone Blends Radical Design and Performance

Trek's new Madone is made to go fast and win races.

Takeaway: A pure-bred road race bike designed to win at the WorldTour level. With its latest Madone, Trek ditches the IsoSpeed decoupler for the new lighter weight, more aerodynamic, and visually radical IsoFlow seatmast.

• Drops weight and gains efficiency.
• Proven geometry remains unchanged from the gen-6 model.
• Flared bars for reduced drag.
• Three SRAM and three Shimano build kit offerings.

Trek Madone SLR 9 eTap Gen 7

Trek’s Madone is an iconic bike. First launched in 2003, the Madone has evolved massively over the past two decades. The platform’s most significant technological leap came about in 2014 when Trek debuted the Emonda, its dedicated lightweight bike. The Emonda freed the Madone from having to strictly be a light bike, allowing aerodynamics to become its primary focus.

To deal with the notoriously stiff and uncomfortable ride of early aero bikes, Trek’s engineers incorporated an IsoSpeed decoupler, similar to the one used on the brand’s Domane endurance bike. With IsoSpeed, the bike’s seat tube moved independently from the top tube and seat stays, allowing it to absorb road chatter and small bumps. The resulting sixth-generation Madone was incredibly fast against the wind while also receiving praise for its ride quality. But the downside was the added weight.

With the new seventh-generation Madone, Trek set an ambitious goal of reducing weight without sacrificing the comfort and aerodynamic properties of the old bike. The most obvious place to shed grams was the IsoSpeed system, now replaced by the visually striking IsoFlow.

According to Trek, function drove IsoFlow’s development. Aided by computational fluid dynamics (CFD), Trek sought to overhaul the entire aerodynamic package of the Madone. The result was a new generation of Trek’s Kammtail tube shapes, including a smoother head tube, a down tube better optimized for use with and without bottles, a taller bottom bracket area, and the radically designed seat tube.

The new Madone is bold and will not be mistaken for any other bike. But it definitely won’t please riders who prefer a more traditional aesthetic. Trek deserves props for pushing the design language of a bicycle forward. Though its looks won't please everyone, I’m happy to see something other than a cookie-cutter, dropped-stays, aero-ish, all-around-er that seems so popular amongst bike designers.

The new seat mast set-up is well-designed, offering easy and consistent height adjustment. But the best detail was in the seat clamp, which allowed for fore and aft adjustment independent of saddle tilt. It’s a small detail that makes setting up the bike much easier, as it allows for minor saddle angle tweaks while leaving it clamped in place.

These changes account for roughly half of the aerodynamic improvements of the new bike. Trek claims that the new Madone saves riders 19 watts of pedaling energy at 28 mph, but just half of that savings (9.3 watts) is from improvements to the frame. The remaining watt savings come from changes to the rider position due to the new flared handlebar design. The Madone SLR handlebar measures a traditional width in the drops, but the bar's flare positions the hoods inward by 30mm. This narrower hood location puts the rider in a more aerodynamic position when riding, thus saving watts.

Thankfully for riders that are particular about their contact points, Trek made the new bike compatible with standard 1-⅛” stems so riders can set up their cockpit however they like. However, changing to this would give up a large chunk of the Madone’s claimed aero benefits unless riders choose a narrower-than-normal bar width.

More importantly for pro riders and weight weenies alike, the new frameset is now two-thirds of a pound lighter than its predecessor. Our 56cm test bike came in at 16.2 pounds which is pretty svelt for an aero bike with 51cm deep clincher wheels and disc brakes. A big part of the weight saving comes from the new IsoFlow design. The cantilevered design of the seat tube and IsoFlow allows for engineered flex in the new Madone. This design is how Trek maintains the Madone’s celebrated ride quality.

Trek stuck to its H1.5 geometry as used on the previous generation Madone. It conceived this as a meeting point between Trek’s old racing-focused H1 geometry and its more relaxed H2 angles. The wheelbase on our 56cm bike was only 983mm, nearly a centimeter shorter than the Specialized Tarmac SL7 and Giant’s TCR, and 13 mm shorter than Canyons Ultimate. Combined with a relatively steep 73.5-degree head tube angle and a 58mm trail figure, you get a bike that will dive into corners as hard as you’re willing to push it.

Pricing and Build Options

There is no getting around the fact that as the top-of-the-line road racing bike from Trek, the Madone is not cheap. The move to electronic-only groups on all builds of the Madone does the price no favors as well. While equivalent new models of the Madone only get $200 more expensive for 2023. The entry-level build for the 2023 Madone SLR 6 (with Shimano 105 Di2) comes in at $8,000. That is a $1,100 increase over the 2021 Madone SLR 6 equipped with mechanical-shifting Shimano Ultegra. Top-of-the-range Dura-Ace and Red eTap builds retail for $12,750 and $13,200, respectively.

Trek offers the new Madone in six builds, three with SRAM (Red, Force, and Rival eTap) and three with Shimano (Dura-Ace, Ultegra, and 105 Di2). All of the Madone builds ship with the new integrated cockpit; Dura-Ace and Red-equipped Madones ship with Bontrager Aeolus RSL 51 wheels, while all other builds get the slightly heavier Aeolus Pro 51.

Ride Impressions

The new Madone has an exceptionally smooth ride, lacking the characteristically dead and harsh feel of past aero bikes. But the mellow ride is not without an edge. The Madone does an exceptional job of balancing all-day comfort with the agility and aggression needed to be a top-tier race bike. Under sharp accelerations, especially at speeds under 25 mph, the Madone felt impressively stiff. But accelerations from the high 20s into 30+mph territory felt a bit more muted, which is not inherently a bad trait. A twitchy bike is not helpful when you’re going that fast.

Once the Madone is up to speed, it just wants to stay there. I was impressed with how quickly and easily the bike would get rolling up to 20-22 miles per hour. Combined with the gentle ride quality, it felt like the new Madone would constantly surprise me with how fast I was going. The sensation of speed on this bike is almost sneaky, you get used to what 25mph feels like on a road bike, but on the Madone, the same pace feels calmer and less frantic, at least in a straight line. Throw the Madone into a corner, and it instantly feels sharp and aggressive.

As a racer, I very much enjoyed the Madone’s willingness to corner aggressively, but it did expose one of the bike's faults. The 25mm tires shipped on our test biker are simply too narrow. Trek claims that the Madone can fit tires up to 28mm, but this feels short-sighted. Wheel brands such as Reserve, Enve, and Zipp now design around a 28mm tire as the default width. There is plenty of space in the frame for wider tires, so Trek is likely very conservative in its stock tire choice and maximum tire width recommendation.

Even riding the stock 25mm tires with pressures as low as 65 psi front and 75 psi rear, the narrow rubber still felt like it was missing grip, with the back end stepping out multiple times when exiting a corner. It was also discouraging that a road bike selling for over thirteen thousand dollars does not ship with tubeless compatible tires or the proper bits to easily set up the Bontrager Aeolus RSL 51 wheels as tubeless.

Another thing missing from the bike was a computer mount. Usually, it is not something I would expect a brand to include, but the bars require a Trek-specific part. Given the complete bike’s price tag and Trek’s integrated cockpit, it should come with a computer mount. I sourced a Blendr mount from my local Trek store, but it was not without its issues (it rattled loose during a training crit and fell off). It is possible to entirely avoid this proprietary part by using a standard 1-⅛” stem and handlebar but making this swap would involve cutting hydraulic houses and would not be cheap.

I was also pleased to see Trek continue using the T47 bottom bracket standard on this bike. A threaded bottom bracket shell is a win for mechanics everywhere. However, the latest Madone is now only compatible with electronic shifting. We can argue whether it's bike brands like Trek (releasing electronic-only high-end bikes) or component brands like SRAM and Shimano (no longer developing high-performance mechanical road groupsets) or if consumers are just voting with their dollars. But the result is that we are witnessing the death of mechanical shifting from high-end racing bikes. And that's a little bit sad.

Ultimately this Madone, like the versions that have come before, was conceived and designed to meet the needs of World Tour professionals. Everything about the bike, from how it rides, to how much it costs, reflects that niche design requirement. Aside from a small pool of professional racers, very few people will likely make the most of this bike’s capabilities. It’s analogous to the way most drivers will not benefit from driving a Formula One car. It’s a pure-bred race bike designed to win at the highest level. If that’s what you’re looking to do—or you just want to own a bike with that ability—then the Madone should be on your shortlist.

Test Editor Dan Chabanov got his start in cycling as a New York City bike messenger but quickly found his way into road and cyclocross racing, competing in professional cyclocross races from 2009 to 2019 and winning a Master’s National Championship title in 2018. Prior to joining Bicycling in 2021, Dan worked as part of the race organization for the Red Hook Crit, as a coach with EnduranceWERX, as well as a freelance writer and photographer. 

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Trek Madone SLR 7 Gen 7 review

Goodbye IsoSpeed, hello IsoFlow

Simon von Bromley

Composed yet fast; innovative design; front end can run both integrated and non-integrated handlebar setups; wide range of frame sizes

Expensive; no power meter; mid-range tyres and cheap inner tubes don’t belong on this bike

Now in its seventh generation, the latest Trek Madone SLR is claimed to be both faster and lighter than ever.

Yet while this latest version retains a typically Madone-esque silhouette, it’s impossible to miss the bike’s unique selling point – the big hole in the seat tube, or IsoFlow, as Trek calls it.

IsoFlow might seem like the main story here, but it isn’t the only thing worth paying attention to.

Overall, the Trek Madone SLR 7 builds on the highly refined Madone platform.

Trek has brought the bike up to date and taken into account the latest aero trends. That's one of the reasons it earns a place in our 2023 Aero Road Bike of the Year category.

While the results are thoroughly impressive on the road, there's no ignoring the high cost of entry, especially on a build with some nominally mid-range parts.

Trek Madone SLR 7 Gen 7 frameset

Unsurprisingly, pro-rider feedback about the previous Madone SLR was simply that those who rode it wanted the new one to be “faster and lighter”.

Starting with the subtler changes, Trek has updated its signature Kammtail Virtual Foil tube shapes (or truncated aerofoils, as everyone else calls them) and overhauled the front end, adding a lighter, fully integrated aero cockpit with flared drops.

Trek also says the handlebar’s narrow hood position plays a significant role in making the bike and rider more aerodynamic.

More noticeably, though, Trek has replaced the comfort-enhancing IsoSpeed system at the junction of the seat tube and top tube with a kite-shaped hole it calls ‘IsoFlow’.

Given most riders, pro or otherwise, apparently didn’t make frequent use of IsoSpeed’s adjustability, Trek opted to replace it with a simpler and lighter solution.

According to Trek, IsoFlow is both lighter and more aerodynamic than IsoSpeed.

Rear-end compliance is claimed to hit the same level as before (with the adjustable IsoSpeed set to its stiffest setting), because the seatpost is essentially cantilevered over the rear of the bike.

Overall, IsoFlow is a win-win solution, Trek says.

The sum of these changes is a bike that’s claimed to be 300g lighter for a complete bike. It’s not a night-and-day difference, but a nice saving nonetheless.

My size-56cm Madone SLR 7 weighs 7.69kg. While that’s slightly lighter than some similarly specced competitors, such as the Giant Propel Advanced Pro 0 AXS and Cervélo S5 , there are lighter aero bikes available for similar money.

The top-spec Canyon Aeroad CFR we tested in 2020, for example, weighed just 7.3kg (size medium). At the time of writing, the 2023 version costs £8,799, yet is specced with a Dura-Ace Di2 R9200 groupset.

In terms of speed, the new Madone is claimed to be 19 watts more aerodynamically efficient at 45kph than the previous one, with a rider on board.

This, Trek says, translates to a time saving of around “60 seconds per hour”, meaning a ride that would take an hour on the old Madone should only take 59 minutes on the new one. That’s an impressive saving for a racer, if the claims are to be believed.

Trek Madone SLR 7 Gen 7 geometry

In terms of fit, the Madone SLR uses Trek’s H1.5 geometry (as seen on the latest Emonda SLR ) – a halfway house between the aggressive H1 and more relaxed H2 geometries it offered previously.

Helpfully, there are eight frame sizes in total, from 49cm to 62cm, meaning a wide range of riders should be able to find a well-fitting bike, too.

Overall, though, the measurements and angles are still very race-focused.

Stack and reach sit at 563 and 391mm respectively, almost identical to key competitors such as the latest Giant Propel and the Cervélo S5.

The head tube and seat tube angles (on my size-56cm test bike) are both relatively steep, at 73.5 and 73.3 degrees, respectively. It also has a short, 58mm trail and a tight wheelbase of just 983mm.

All of which points towards nimble, reactive handling and a riding position designed to encourage you into an aerodynamic riding position .

Trek Madone SLR 7 Gen 7 build

Despite the five-figure price tag, the build encompasses a suite of parts that are nominally mid-range (or would have been before the great bike industry price hikes of recent years).

You get Shimano’s Ultegra Di2 8100 groupset, instead of Dura-Ace Di2, for example. The wheelset is the mid-range carbon Bontrager Aeolus Pro 51, instead of the top-tier Aeolus RSL.

Trek has specced Bontrager R3 Hard-Case Lite clincher tyres (in a size 700x25c), instead of the pricier tubeless-ready versions or the beautiful (and even more expensive) R4 320 Handmade cotton clinchers.

A Bontrager Aeolus Elite saddle, with ‘Austenite’ (a type of steel alloyed with nickel) rails is chosen, rather than the Pro or RSL models with carbon rails.

You don’t get a power meter with Shimano builds, either. SRAM builds come with Quarq power meters as standard, though are a little more expensive as a result.

This ‘mid-range’ kit mostly performs excellently, though, and one could argue upgrading these parts to the fancier, lighter versions is only going to offer marginal gains at even greater expense (that’s what the £13,500 Madone SLR 9 offers).

However, when you consider some of the best aero bikes are available with equivalent specs for significantly less money, it’s a tough pill to swallow.

Still, Trek is far from the only brand making expensive bikes these days.

Whether it’s the Specialized S-Works Tarmac SL7 , Pinarello Dogma F or Colnago V4Rs , to name three, there are certain bikes that aren’t focused on value first and foremost, and that’s okay.

Though an important factor in any purchasing decision, value won’t be the only consideration for everyone, after all.

Trek isn’t cutting any corners with the most important aspect of the bike, either – the SLR frameset and integrated handlebar are exactly the same as those used to compete at the highest level.

Like my colleague, Ashley Quinlan , who reviewed the Madone SLR 9 eTap last year, I came away impressed by the Madone’s front-end.

As already noted, the new handlebar features a slightly narrower, 39cm (centre to centre) hoods position, while it flares out to 42cm wide at the drops.

This gives you the aerodynamic gain of a narrower handlebar at the hoods, with the wider drops providing additional control and leverage for descending and sprinting.

It’s nowhere near as extreme as the 33/37cm handlebar featured on the Ribble Ultra SL R I tested just prior to the Madone, which inevitably means the gain isn’t as obvious. However, it’s certainly a less intimidating change for those not used to riding with narrow handlebars .

All things considered, it’s a positive change, with no notable compromises to comfort or handling.

There are 11 different stem-length and handlebar-width combinations available, and Trek says a dealer can swap a handlebar size at the point of purchase for no extra cost.

Alternatively, it’s also possible to run a standard, 1 1/8in stem and any handlebar you like, giving you near-limitless options for front-end customisation.

My only real disappointment was my test bike’s drab matt black paintjob .

Trek is renowned for producing some of the peloton’s best paintjobs in recent years, yet, save for the cool reflective down tube logo, this one is about as dull as they come.

Of course, others might feel differently and, either way, there are other choices available, plus the option for a custom paintjob through Trek’s Project One programme (at additional expense).

Trek Madone SLR 7 Gen 7 ride impressions

The Madone’s greatest strength is that it manages to feel like a non-aero bike, but faster.

It barrels along on flat or rolling roads, yet feels snappy and energising when you start climbing or rise out of the saddle to sprint over a brow.

I can’t say whether IsoFlow makes the Madone any faster, but it certainly makes for a comfortable rear end when paired with the excellent Bontrager Aeolus saddle (a firm favourite among many testers at BikeRadar).

It's obvious enough to make the handlebar feel fairly stiff in contrast, in fact.

As expected, Shimano’s latest Ultegra Di2 groupset (here with suitably sporty, 52/36-tooth chainrings and an 11-30-tooth cassette) offers near-faultless performance, albeit at a slightly heavier overall weight than Dura-Ace.

The latest Shimano hydraulic brakes, with burly 160mm rotors front and rear, make the Madone a great partner on descents, too.

Despite the quick handling and short wheelbase, there’s no hint of instability at high speeds.

The Bontrager Aeolus Pro 51 wheels also impress. At a claimed 1,590g for the pair, they don’t feel cumbersome when climbing steep pitches, yet the 51mm-deep rims provide a noticeable performance benefit on the flats.

A 23mm internal rim width also helps provoke extra volume out of the 25c tyres, which inflate to 28.5mm wide at 65psi/4.5 bar.

With an external rim width of 30mm, Trek likely opted for 25c tyres (rather than 28c or larger tyres as many brands now do) to optimise the aerodynamic performance of the combination.

On good-quality roads, this combination doesn’t pose any issues, but I did find myself wanting for greater tyre volume whenever my test rides took a turn down a broken lane.

Fortunately, there’s plenty of scope to size up, if you want more cushioning or grip.

Frame and fork clearance is rated for up to 28c tyres (which would likely measure around 30mm wide on the Bontrager rims), but the space around both front and rear tyres suggests that’s a conservative estimate.

My main issue in this area, though, is the stock Bontrager tyres offer only average performance.

Grip levels are good, but rolling speed isn’t competitive with the best road bike tyres , and the ride feel is disappointingly wooden too.

The latter two points can be attributed partly to the basic butyl inner tubes supplied as stock.

Upgrading to latex or TPU inner tubes would doubtless go some way to improving both, but it’s also fair to say these tyres won’t ever get the most out of this bike no matter what you put in them.

That Trek is charging £10,200, yet skimping on something as critical as tyres, is disappointing.

Replacing them would be relatively easy and inexpensive, of course (and you could go tubeless too, with the addition of tubeless rim tape, valves and sealant for the wheels), but you shouldn’t have to when you’ve spent this much money.

Trek Madone SLR 7 Gen 7 bottom line

The Trek Madone SLR 7 manages to combine the fun and engaging ride quality of a normal race bike with the speed of an aero bike.

It would be a fantastic companion for racing or fast group rides, yet is comfortable enough for big days in the saddle, too.

Though technically mid-range, the parts and components offer excellent all-round performance (tyres and inner tubes aside). Even so, it’s still hard to ignore the fact there are many similarly specced competitors available that cost far less.

However, if you want a super-fast road bike that pushes the boundaries of aerodynamic design and says ‘Trek’ on the down tube, the Madone SLR doesn’t disappoint.

Aero Road Bike of the Year 2023 | How we tested

If you’re trying to ride faster, then aerodynamic drag is usually your biggest problem.

Previously, though, picking a dedicated aero road bike meant compromising on things such as comfort and practicality. Fortunately, such issues are (largely) problems of the past.

Today’s aero bikes are fast on the flats and no slouches up hills either. Most now include clearance for wide tyres and the best have front ends that don’t require a degree in mechanical engineering to work on.

With that in mind, we put the contenders to the test on the twisty, technical and rolling hills of south Bristol.

As with all road bikes, we considered how easy each bike is to live with, and how easily the stock setup can be adjusted to suit your personal needs and riding style.

Many of the bikes featured in this year’s Aero Road Bike of the Year test are at the upper end of the pricing scale, with premium groupsets and parts showcasing the best contemporary equipment. However, most are also available in cheaper specs if your budget doesn’t stretch as far.

Our Aero Road Bike of the Year contenders

• 3T Strada ICR Force eTap AXS
• Giant Propel Advanced Pro 0 AXS
• Ribble Ultra SL R Enthusiast
• Trek Madone SLR 7

Thanks to our sponsors, Lazer , FACOM tools and Band Of Climbers for their support in making Bike of the Year happen.

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Trek Madone SLR 7 Gen 7 review - very fast and very expensive

The latest Madone may have a hole through the seat tube but we couldn't find any in its performance

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The Trek Madone is an absolute speed weapon. The deep-section tubes with the radical-looking cutout help, as does the newly designed handlebar, which is narrow and provides good wrist support for the ‘aero-hoods’ position. And then there are the 51mm deep Bontrager Aeolus Pro wheels. The handling is incredibly fast, responding to the smallest shift in weight and the tiniest tweaks of the bars, and ride quality is so impressive that it’s almost possible to overlook things like the narrow tires and ungenerous clearance - but you can’t ignore the price. If you have the budget and want a WorldTour-level race machine with exceptional handling and ride feel, this is the bike.

Super smooth ride

Light for an aero bike

Striking aesthetics

Limited adjustability

No power meter

You can trust Cycling Weekly. Our team of experts put in hard miles testing cycling tech and will always share honest, unbiased advice to help you choose. Find out more about how we test.

• Construction

Value and conclusion

For this latest Gen 7 version of the Madone, Trek’s aero bike, the US brand removed the IsoSpeed Decoupler of the previous Gen 6 model and left, in its place, a big hole.

OK, it’s not the crude, reductionist approach it sounds like.

The old bike’s micro-adjustable suspension system at the top tube/seat tube juncture added weight and was mostly redundant since Trek discovered most riders would ‘set and forget’.

And by radically reengineering the frame Trek claims to have saved 300g, and says the new bike is almost 20 watts faster than its predecessor, which equates to 60 seconds per hour when ridden at 45kph. It looks radical, too - always a good thing for a new bike.

In our 2023 Race Bike of the Year grouptest we awarded the Madone 'best aero bike' against competition that included the Cervélo S5, the Canyon Aeroad and the Giant Propel.

However, over $9K / £10K for an Ultegra bike has to be unchartered territory - so how does it compare overall to the best road bikes ?

Trek Madone 7 Gen 7: construction

Let’s peer a bit more closely into that hole or, to give it its real name, IsoFlow. The aerodynamic explanation for it is: “It’s a way to direct some high energy flow into a low energy region of the bike.” What that means is that the seat tube area creates a disproportionate amount of drag and the hole helps to dissipate this by adding what Trek calls a “jet of fast moving air.”

It turns out that only half of the claimed watt saving comes from the IsoFlow hole. Trek has entered the integrated cockpit wars (along with Colnago, Canyon, Cervélo et al) with a completely new and very slick-looking design but it’s neither adjustable nor V-shaped: according to Trek it saves watts by changing rider position rather than via the aerodynamic properties of the cockpit itself.

A standard 42cm bar becomes 39cm at the hoods and 42cm at the drops and there’s a backsweep so that a flat-forearms aero position on the hoods becomes very aero indeed.

There are 14 different combinations available and, since the backsweep gives the bar a shorter reach, it’s important to get the right one - if you’re like those of us who rode this bike, you’ll need a longer stem. You can change this at point of purchase at no extra cost, Trek told us, or the 1 1/8in steerer is compatible with a non-integrated stem and bar (though the frame is electronic groupset only).

The same goes for the seatmast. The cutout in the seat tube leaves less room for a long seatpost and less adjustability (around 6cm minimum to maximum) so if you are long-legged but prefer a smaller frame you may need the tall version that comes with the size 56 upwards (as I ideally would have done). There are also two offsets available.

Our size 54 with a standard short mast could only manage a maximum saddle height of 74cm and the reach felt very short with the 90mm stem cockpit it comes with.

The latest geometry is called H1.5 (halfway between the old H1 race and H2 endurance). The reduced reach combined with the shorter reach of the swept-back bar works very well for that super aero hoods position, but it does feel surprisingly short. The kamm-tailed rear of the stem is much closer to your knees than you’d expect.

The new SLR bikes are all made from Trek’s 800 OCLV carbon - from the 105-equipped SLR 6 up to the flagship SLR 9 - and are impressively light, especially compared with other aero bikes such as the Cervelo S5. Trek says this is its lightest ever disc Madone.

There’s clearance for 28mm tires max, which is tight by modern standards. This model comes with Bontrager Aeolus Pro 51 tubeless-ready wheels, set up with Bontrager R3 Hard-Case Lite 25mm tires and inner tubes - again, surprisingly narrow.

Despite the fact that the fit wasn’t optimal - I could have done with the size up - the ride quality of the Madone is absolutely incredible. That’s the first thing that strikes you, or rather doesn’t strike you.

Aero bikes used to supply a harsher ride simply because deep, bladed tubing doesn’t flex like round tubing. This was undoubtedly the reason why Trek bolted the IsoSpeed decoupler onto the Madone two iterations ago. So you might expect that with its suspension system gone, the latest bike might have gone backwards in comfort. Not a bit of it.

It feels like a coiled carbon spring - full of potential energy and floating over bad road surfaces seemingly without any effect on its speed. And this is on 25mm tires that aren’t even the best (at this price they really ought to be).

The handling is also exactly right. The shortish 90mm stem section of the cockpit could have made it a little twitchy, but thanks to the sweeping shape I found my weight sufficiently over the front wheel in the hoods position, and steering was fast but balanced on descents and tight corners.

So it passes ‘comfortable’ and ‘fast’ with flying colors (actually Deep Smoke for this one).

At 7.5kg it’s light for an aero bike - or any disc brake bike - and it leaps up hills as if it weighs even less. I was so impressed with its performance that I kept forgetting Trek also has the Emonda climbing bike. The next Emonda has its work cut out (pun intended).

Finally, stability in crosswinds. There’s one particular gateway on my test loop where any bike not designed for big yaw angles will be gusted and the Trek was indeed blown sideways slightly - but not alarmingly considering the deep wheels and frame tubes.

This bike is incredibly good but it’s also incredibly expensive. It’s a full $1,000 / £1,000 more than the equivalent outgoing Gen 6 Madone SLR 7, and you’d have to look hard to find a more expensive Ultegra Di2-equipped bike from the other mainstream brands. 

The Canyon Aeroad CFR with Dura-Ace costs $8,999 / £8,799, while the Cervelo S5 with SRAM Force AXS costs $9,000 / £9,200. The Giant Propel Advanced SL1 also with SRAM Force costs $8,000 / £8,999.

You might also reasonably expect a power meter at this price - those three bikes all come with them - but it’s just the regular Ultegra crankset here.

So the price is stratospheric but compared with the current aero bikes I’ve ridden so far including the Colnago V4RS , Canyon Aeroad SLX , Cervelo S5, Tarmac SL7 and Pinarello Dogma F, the ride quality is superior.

• Frame: 800 Series OCLV carbon
• Fork: KVF carbon, tapered steerer
• Groupset: Shimano Ultegra Di2
• Wheels : Bontrager Aeolus Pro 51
• Tires : Bontrager R3 Hard-Case Lite 25mm
• Cockpit: Madone integrated
• Seatpost : Madone aero internal
• Saddle: Bontrager Aeolus Elite
• Weight: 7.5kg
• Contact: www.trekbikes.com

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Simon Smythe is a hugely experienced cycling tech writer, who has been writing for Cycling Weekly since 2003. Until recently he was our senior tech writer. In his cycling career Simon has mostly focused on time trialling with a national medal, a few open wins and his club's 30-mile record in his palmares. These days he spends most of his time testing road bikes, or on a tandem doing the school run with his younger son.

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Aero and climbing bike in one – Testing the 2024 Trek Madone SLR 9 AXS

Trek merge the aero Madone with the lightweight Émonda, following the all-round racing bike trend. Thus, the Émonda is history and the Madone is now a whole lot lighter. We put the all-purpose racer to the test on the steep climbs, fast descents, and flat plateaus of Ávila, Spain. Can it deliver? Read on to find out.

The bike and the concept are new, but the name Madone remains. On the one hand, Trek want to stick to the established name of their flagship race bike and, on the other hand, coming up with a new name in the Trek drop bar line-up isn’t easy due to the anagrammatic naming convention. So, Madone continues to stand for the fastest race bike in the Trek cosmos, the 8th generation of which has become significantly lighter.

It’s not just end users that struggled choosing the right Trek for the job: Do you want a very light or a very fast bike? Even the pros were confronted with this dilemma before and after every race, wondering which bike will be or would have been the right one. The feedback received from the Lidl-Trek UCI WorldTour Team was unanimous: a Madone weighing 6.8 kg would definitely be the bike of choice. To achieve this ambitious goal, Trek’s development team had to break new ground in terms of both the aero concept and material choice.

Merging the Émonda and Madone

The Trek Madone and Émonda had the same geometry, so pros didn’t have to get used to changing bikes. But the two bikes looked very different. While the Émonda stood out with its delicate carbon stays and accessories, the Madone was characterised by elongated tube shapes, a deep aero seat post, and the striking IsoFlow cut-out in the seat tube.

The latter also dominates the look of the new Madone, as Trek have kept the IsoFlow concept for compliance at the rear. Overall, however, the frame and, above all, the fork have become significantly skinnier, which is undeniable when looking at the area around the IsoFlow cut-out. It almost looks a little fragile due to the skinny carbon stays. But don’t worry, like all Trek bikes, the frame is approved for a gross weight of up to 125 kg.

You can see that Trek have saved weight when looking at the shape of the Gen 8 frame:

The tubes are much skinnier than those on the previous Madone, and Trek were able to save a particularly large amount of weight on the fork. In fact, Trek’s development team achieved their goal of making the frame lighter than the Émonda. A painted M/L frameset is claimed to weigh just 1,146 g. That’s a whole 320 g lighter than the frame of the previous Madone SLR Gen 7.

However, the slightly more aerodynamically optimised components like the cockpit and wheels are a bit heavier than those of the climbing specialist Émonda, the complete bike of which tipped the scales at an impressive 6.8 kg, thereby maxing out the UCI weight limit. The flagship version of the new Madone on test weighs just around 240 g more.

Saving so much weight without sacrificing aero gains was no easy task. The material used plays an important role here, setting new quality standards with OCLV 900 carbon. This is around 20% stronger than the previous OCLV 800 variant, which in turn allows Trek to use less material while achieving the same level of stiffness.

The new carbon is further optimised through a revised moulding process. A preformed bladder inside the mould ensures a more precise material distribution and less wrinkles on the inside of the frame, thus further reducing weight. However, the new carbon fibre and optimised moulding process are exclusive to the SLR line. The SL models are still made from OCLV 500 carbon, which results in heavier frames, but also lower prices 😉 .

To avoid compromising the aerodynamics compared to the previous Madone, Trek rely on a new aero concept. In general, the extremely elongated tube shapes are a thing of the past. At first glance, the flat down tube looks anything but aero, though it ensures that the air stream flows over the frame and aero water bottles, only rejoining behind the bike. With the aero water bottles attached, the new Madone is even said to be faster than the 7th generation, despite the tire width having grown from 25 to 28 mm. Incidentally, the water bottles are included with all SLR models, and available separately for the SL versions. If you get handed a round bottle in a race, you can rest assured that the bottle cages are cross compatible with traditional, non-aero optimised bottles.

The 2024 Trek Madone SLR 9 AXS Gen 8 in detail

The bright colours of the team livery and matching bottles make for an eye-catching bike, likely reminding art fans of Piet Mondrian and Europeans of a certain chain of discount stores. For those wanting something a little more subtle, Trek also offer monochrome versions. Alternatively, you can go wild with your own designs using the Project One configurator.

Trek Madone SLR 9 AXS 2025

Specifications.

Seatpost Madone aero carbon seatpost, 0mm offset, short length Drivetrain SRAM Red eTAP AXS 2 x 12 Handlebar Trek Aero RSL Road integrated bar/stem 410 mm Wheelset Bontrager Aeolus RSL 51, 12 x 100/12 x 142 mm Through Axle Tires Pirelli P Zero Race 700 x 28c 28 Cranks SRAM RED AXS E1, power meter, 48/35, DUB, 175mm length Cassette SRAM XG 1290 10-33T

Technical Data

Size XS S M ML L XL

Specific Features

For the flagship version on test, Trek rely on the new SRAM RED groupset. The bike rolls on 51 mm deep Bontrager Aeolus RSL 51 wheels and 28 mm Pirelli P ZERO Race tires. The saddle and cockpit are sourced from Trek’s in-house brand Bontrager. Together with the bike, Trek have also launched the new Aero RSL Road handlebar and stem combination, boasting fully integrated cable routing, flare, and optimised ergonomics, available in many different length and width combinations.

The geometry of the 2024 Trek Madone SLR 9 AXS Gen 8

The geometry has hardly changed compared to the predecessor. The reach-to-stack ratio remains at around 1.5, which corresponds to Trek’s H 1.5 geometry. This should be relatively aggressive, but not extreme, favouring a centred riding position. The seat and head tube angles also remain the same. Trek emphasise that they were already very satisfied with the geometry of the Madone Gen 7 and Émonda. Because the two predecessors already shared the same geometry, there was no need for Trek to find a compromise.

The frame itself is a bit more compact, though this may be partly due to the new frame sizes. Instead of eight sizes from 47 to 62 cm, the 8th generation of the Madone is available in six sizes, now classified as: XS, S, M, M/L, L, XL. The seat mast cap allows you to adjust the saddle height by ten centimetres. From size XS to XL, the range of possible saddle heights has increased to anything between 54.9 and 85.9 cm. As such, it accommodates riders at the outer ends of the size spectrum. The new sizing convention should also be more clearly distinguished from each other to make it easier for riders to choose the right frame size.

First ride aboard the 2024 Trek Madone SLR 9 AXS Gen 8

A bike as fast as the previous Madone and as light as the Émonda? Let’s go! Trek’s claims set our expectations quite high long before we got to set off on the first test ride. Once in the saddle, however, the combination of minimal weight and aero optimisation delivered! There are two aspects on the new Trek Madone SLR 9 AXS that stand out: acceleration and comfort. The new Madone SLR 9 AXS Gen 8 accelerates with ease on the climbs, out of corners, and on the straights. Input equals output. The reduced weight is clearly noticeable. While the previous Madone took a little more effort to get up to speed, it now has the lively character of the Émonda .

Comfort was already the mainstay of the Madone SLR Gen 7, debuting the IsoFlow technology, yet Trek have made significant improvements here too. The overall compliance feels a lot more balanced. The skinnier fork, new cockpit, and wider tires offer significantly more vibration damping at the front than the predecessor. The revised IsoFlow system performs as unobtrusively as ever at the rear – apart from the look 😉. It flexes noticeably, effectively mitigating vibrations and bumps. The Madone SLR 9 AXS Gen 8 is surprisingly comfortable for a thoroughbred race bike, which is partly due to the centred riding position and ergonomics of the cockpit. Speaking of which, the handlebar is 3 cm wider in the drops, resulting in a flared shape that offers aero benefits on the hoods, and ample control in the drops for the descents and sprints. The pro peloton trend of using ever narrower cockpits with flared drops suits the bike’s the character to a tee, putting the rider into a more aerodynamic position, because the rider is responsible for most of the drag.

The handling of the new Madone SLR 9 AXS Gen 8 is more reminiscent of the Madone Gen 7. It’s got none of the razor-sharp handling of the Émonda. The new all-round racer feels stable and composed, yet precise and responsive. Perfect for high speeds, which the Madone is more than capable of. In terms of efficiency and speed, the new Madone is in no way inferior to its predecessor. In fact, it’s even better. Thanks to the narrower tube shapes, the new Madone is less susceptible to crosswinds and is therefore easier to control. The aero water bottles take some getting used to. Because the bottles only fit in a specific position, you have to fiddle a bit to get them back in place.

Who is the Trek Madone SLR 9 AXS Gen 8 for?

Trek’s new all-rounder racer is a very versatile bike with a wide range of applications, even off the racetrack. It serves for everything from fast group rides, epic tours on legendary climbs, or simply as a comfortable and fast means to get from A to B. The IsoFlow system, increased tire width, and centred seating position make the new Trek Madone one of the most comfortable and compliant race bikes currently on the market. It also ranks very highly in terms of acceleration, efficiency and handling. The new Madone SLR 9 AXS is the right bike for everyone who prioritises speed and comfort, assuming it’s within your budget.

Our conclusion on the Trek Madone SLR 9 AXS Gen 8

The all-round race concept works. A bike as fast as the Madone and as light as the Émonda is as good as it sounds, and it makes easy work of choosing the right bike. In addition to performance, however, it’s the compliance and ergonomics that make the Trek Madone SLR 9 AXS Gen 8 stand out from the crowd. Added to that are the latest generation aero bottles and perfectly matched components. All in all, this is a race bike that isn’t just fun in a local criterium.

• quick acceleration
• superb comfort

• fiddly handling of the aero water bottles

For more information, visit trekbikes.com

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Words: Jan Richter Photos: Jan Richter, Trek

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• Madone SLR 7 eTap

Trek Madone SLR 7 eTap

Madone SLR 7 Disc eTap is ultralight, insanely fast, and super smooth. This carbon road bike is built with our all-new 800 Series OCLV Carbon aero frame, Adjustable Top Tube IsoSpeed, hydraulic disc brakes for all-weather stopping power and control, and an wireless electronic SRAM drivetrain for fast and reliable shifting. It's right for you if... You're serious about speed, and you want our best aero frame. You also want the precision, predictability, and smoother gear progression of SRAM's 12-speed Force eTap AXS fully wireless electronic drivetrain. The tech you get Our lightest-ever 800 Series OCLV Carbon frame with Kammtail Virtual Foil aerodynamic tube shaping, road-smoothing Adjustable Top Tube IsoSpeed, and invisible cable routing. A 2x12 SRAM Force eTap AXS wireless electronic drivetrain, a SRAM Force AXS power meter, and hydraulic disc brakes, tubeless ready Bontrager Aeolus Pro 5 carbon wheels, and an adjustable aero bar and stem. The final word Madone SLR is our best and lightest aero frame, but it's the SRAM Force AXS drivetrain that sets this model apart. You get the performance advantage of wireless electronic shifting, a 12-speed cassette, and a SRAM Force AXS power meter. Why you'll love it - 800 Series OCLV Carbon is the lightest laminate we’ve ever made, and it makes Madone faster on any terrain, in any conditions - Comes with a SRAM Force AXS power meter for more effective training rides from the start - Adjustable Top Tube IsoSpeed lets you adjust compliance to your preference, and it's damped with an elastomer so it rebounds in a smooth, controlled, stable motion - A separate bar and stem with an aero carbon faceplate gives you great adjustability without compromising on aerodynamics - Madone Project One ICON paint schemes make the ultimate race bike a true piece of artwork

Electronic shifting

Electronic drivetrain systems deliver excellent shifting, easy set up, and solid battery life. Here are the highlights of today’s electronic shifting systems:

Shifting Performance Electronic shifting systems use powerful servomotors to rapidly shift the chain. Because microprocessors and sensors constantly monitor every aspect of the system, they shift with precisely and without chain rub.

Customization Many major systems have customizable shifting. Some have the ability to add remote shifters for common riding positions, and some even allow you to change the functions of the shifting buttons.

Dependability Electronic groupsets are responsive and consistent. There are no cables to stretch and wear out, so you get a flawless shift every time. The added bonus is you’ll never have to replace a derailleur cable ever again.

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The lightest and fastest Trek road race bike ever, the Madone SLR. For those looking for the ultimate race bike, the Madone ticks all the boxes - unprecedented aerodynamics, outstanding ride quality and super light design. Featuring IsoFlow technology, every Madone rider will reap the rewards of speed and excellent handling, as this bike flexes over any bumps in the road with ease. Explore the wide range of Trek Madone bikes at Sigma Sports and find a size and specification to suit you.

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Full System Foil aero tube shapes optimize aerodynamics and redefine speed 900 Series OCLV carbon frame is extremely light, stiff for power, and compliant for comfort Carbon wheels reduce weight and enhance performance for climbing and descending

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Full System Foil aero tube shapes redefine bike speed and optimize aerodynamics 900 Series OCLV carbon frame offers exceptional lightness, stiffness, and comfort Carbon wheels enhance performance for climbing and descending

- Revolutionary Full System Foil aero tube shapes enhance bike speed and aerodynamics - 900 Series OCLV carbon frame balances lightness, stiffness, and comfort - Carbon wheels optimize performance for climbing and descending

- 900 Series OCLV carbon frame: incredibly light, stiff for power, and compliant for comfort - Carbon wheels optimize weight and performance for climbing and descending - Shimano Ultegra Di2 drivetrain offers lightning-fast, customizable precision shifts

Revolutionary Full System Foil aero tube shapes for optimized bike aerodynamics 500 Series OCLV Carbon frame with new tube shaping for reduced weight Carbon wheels enhance performance for climbing and descending

Frame: 500 Series OCLV Carbon, Full System Foil tube shaping, flat mount disc, UDH Drivetrain: SRAM Rival eTap AXS, 12-speed Wheels: Bontrager Aeolus Elite 35, OCLV Carbon, Tubeless Ready

Aerodynamic Design: Revolutionary Full System Foil aero tube shapes optimize speed and efficiency. Electronic Shifting: Shimano 105 Di2 group set offers lightning-fast, precise shifts. Carbon Wheels: Bontrager Aeolus Elite 35 wheels are lightweight and tubeless-ready for superior performance.

Fork: Madone Gen 8 full carbon Drivetrain: Shimano 105, 12-speed Wheels: Bontrager Paradigm SL, Tubeless Ready

Advanced Carbon Construction: 900 Series OCLV Carbon frame, incredibly lightweight at 796g (ML size). Aerodynamic Efficiency: Full System Foil tube shaping and integrated aero features enhance speed and efficiency. Versatile Performance: Ideal for competitive racing with comfort-focused IsoFlow technology, accommodating up to 32 mm tires.

Advanced Carbon Construction: 500 Series OCLV Carbon frame, lightweight at 1054g (ML size). Aerodynamic Efficiency: Full System Foil tube shaping enhances speed and efficiency. Comfort and Performance: IsoFlow seat tube technology balances comfort with aerodynamics, supporting up to 32 mm tires for versatile riding conditions.

A frame that's made using our 800 Series OCLV Carbon IsoFlow technology helps the seat mast flex for a more comfortable ride while also improving frame aerodynamics and shaving weight An ergonomic and aerodynamic cockpit puts you in a faster, more comfortable, position for power

Full System Foil aero tube shapes redefine speed and optimize aerodynamics across the entire bike. Crafted from ultra-light and stiff 900 Series OCLV carbon for a perfect balance of power and comfort. Carbon wheels reduce weight and enhance performance for climbing and descending.

     Full System Foil aero tube shapes optimize aerodynamics and redefine speed 900 Series OCLV carbon frame is extremely light, stiff for power, and compliant for comfort Carbon wheels reduce weight and enhance performance for climbing and descending

A full OCLV Carbon frame paired with the magic of an electronic Shimano 105 Di2 drivetrain provides a premium ride IsoFlow technology helps the seat mast and saddle flex for a more comfortable ride while also improving frame aerodynamics and shaving weight Flared Bontrager RSL Aero Handlebar is comfortable in the drops, improves aerodynamics and looks super sleek Deep Bontrager Aelous Elite 50 carbon wheels cut through the wind and lighten your ride

A full OCLV Carbon frame paired with a wicked fast Shimano Ultegra Di2 drivetrain provides an ultra-premium ride IsoFlow technology helps the seat mast and saddle flex for a more comfortable ride while also improving frame aerodynamics and shaving weight Flared Bontrager RSL Aero Handlebar is comfortable in the drops, improves aerodynamics and looks super sleek Deep Bontrager Aeolus Pro 51 OCLV Carbon wheels cut through the wind and lighten your ride.

• 800 Series OCLV Carbon, KVF frame with IsoFlow seat tube and invisible cable routing
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2022 Trek Madone SL7 Gen 6

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