Trek Madone SLR 9 Disc

The Trek Madone SLR 9 Disc delivers the speed that its impressive looks suggest, backed up by good handling and, thanks to the new adjustable IsoSpeed decoupler, reasonable smoothness. Make no mistake, though, it's still very much a firm ride. The £10k price doesn't look out of place these days, but the specification is lacking a few things to make it the ultimate bike it so nearly is.

• Pros: Seriously fast, good handling, geometry, fit, looks, spec
• Cons: Not the smoothest, no power meter, compact chainset, heavy

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All about the speed

If you want to go fast, get yourself an aero bike. Yes, at the end of the day it's about the rider and the legs, but swapping from a regular road bike with round tubes to the Trek Madone SLR reveals an immediately noticeable increase in speed, with higher speeds more easily reached for less effort.

Speeding on the Madone SLR really is very addictive. It's impossible to go out for a gentle jaunt. It wants hammer-time all the time. How it stacks up against other aero bikes needs some proper independent wind tunnel testing, but my seat-of-the-chamois impression, along with speed and power data from regular testing loops, confirms that it's easily comparable to the key rival aero bikes in this sector.

Some bikes just look fast, the Madone actually is fast. A regular proving ground for testing bikes is my local chain gang. Where better than a power hour to put a race bike through its paces, with rolling terrain, some punchy climbs and some fast drags, and people a lot fitter and faster than I am to keep up with? The Madone has given me the best advantage yet, not only allowing me to keep up but also slice a massive two minutes off my PB for the 40km route.

It's clearly insanely fast at high speeds. Get it up to 30kph and the speed really ramps up as you pile on the watts. But it doesn't feel quite as snappy at lower speeds, out of tight corners, and the weight holds it back on steeper gradients.

Handling and geometry

The Madone's handling is race-focused, as you'd expect. The new H1.5 geometry, which replaces the previous choices of slammed H1 and relaxed H2, is well judged. It provided a comfortable fit with a bit of stretch to the handlebar.

I shuffled a few spacers about – an easy task as the aero spacers are split – to get my desired position, a bit lower than standard. In the drops, it's an aggressive position but it's comfortable on longer rides too, but then I am used to race bike geometry which certainly helps.

The new two-piece bar and stem allow more fit adjustment than before, with the angle of the handlebar adjustable to suit your preference. The bar is a comfortable shape with the swept back design providing manageable reach to the hoods and drops.

It's a handlebar intended to be ridden in the drops or hoods the majority of the time – there's no tape on the tops. You can still cruise along gripping this section if you really want. The narrow 38cm width is good for reducing drag and keeping your arms tucked in, but might not be everyone's cup of tea. On a bike of this price, you can easily spec the bar width to suit your requirements.

Better brakes

The biggest improvement over the previous generation Madone, in my opinion, is the change from the custom designed integrated brakes with the head tube flaps (Vector Wings, in Trek speak) to disc brakes.

You'll have your own preference of braking system, and Trek is still offering the Madone SLR with rim brakes. In fact, it's one of the few brands still to offer rim brakes – many rival brands have fully embraced disc brakes with their latest aero bikes.

Compared to the slightly finicky integrated brakes of the previous Madone, the hydraulic disc brakes are easy to live with and required no maintenance during my time with the bike. Power is plentiful and lever feel is perfect for meting out the power smoothly in every situation. I experienced some occasional noise in damp weather but never for long.

Another benefit of disc brakes is increased tyre clearance, with 28mm tyres supported. That's a good option if you want to increase comfort. By contrast, the rim brake Madone only takes up to a 25mm tyre.

Fast and comfortable? Fast or comfortable?

I remember riding some of the first generation aero bikes and coming away impressed with the speed compared with regular road bikes, but less taken with the reduced ride comfort. Big aero tubes aren't good for building compliance and comfort into a bike.

Trek's solution, rolled out with the last Madone and upgraded with adjustability on this second generation bike, is the same IsoSpeed decoupler first developed for the Domane, an endurance bike designed to tame the cobbles of Paris-Roubaix.

Trek has now integrated the IsoSpeed decoupler into the top tube, from its previous location in the seat tube, and made it adjustable, allowing you to choose how soft or firm it is.

The IsoSpeed decoupler basically allows the seat tube and seatpost to move independently of the frame in a controlled manner, with a new elastomer bumper to control the rebound. Undo a couple of bolts and you can move a small slider to choose the firm, soft or somewhere-in-between setting.

If you're going from smooth crit circuits to bumpy normal roads you might adjust it frequently. Or, as in my case, you might play around with it for a few rides then just leave it in the softest setting.

Does it work? Yes, it does. How much compliance does it actually provide? Trek says: 'Compliance at the saddle of a 56cm frame ranges from approximately 119N/mm to 175N/mm depending on the slider's position. According to these figures, the new Madone is capable of both more compliance (+17%) and less compliance (-22%) than its predecessor.'

What does that mean on the road? In my experience the IsoSpeed softens bigger impacts, say if you clip the edge of a sunken drain or pothole when you're in a peloton and can't read the road ahead of you.

But make no mistake, the Madone still provides a very firm and hard ride. It just doesn't seem to be sensitive enough to smooth out poorly surfaced roads, the type where the top layer of tarmac has eroded away, or worse still, surface dressed roads. It's easy to overlook when you're galloping along, but on casual rides I found it a bit tiring.

Frame design

If there's an award for the biggest aero down tube, the Madone wins hands down. No other aero bike goes to such extremes to reduce drag as the Madone with massive profiles at the fork, down tube, seat tube and stays, all intended to reduce drag as much as possible.

The two-tone paint job gives an air of quality, a sparkly gloss paint over matt black. It's one of a handful of stock colour options too, and there's also Trek's Project One where a world of custom paint schemes awaits.

Integration is a key buzzword in bike design these days, and with the Trek Madone it's the IsoSpeed decoupler hidden away underneath the top tube, and a new aero handlebar and stem with greater fit adjustment than the old one-piece aero handlebar.

All cables and hoses are routed inside the Madone, right from the front where they are hidden inside the handlebar and stem and into the frame. The only exposed cabling is just where they exit ahead of the derailleurs and callipers.

The Di2 junction box is hidden inside the handlebar for easy charging and gear tweaking.

Aero handlebars are a prime method for reducing frontal surface area, which is why nearly all aero bikes now feature them. The downside is the limited fit adjustment. Trek's new handlebar uses a design that splits the stem, allowing the angle of the handlebar to be adjusted with a range of +/-5 degrees. Under the stem are four bolts you can loosen to adjust the tilt of the handlebar. Computers and other accessories can be bolted to the front of the handlebar using a GoPro-style mount.

As I said earlier, the Madone uses Trek's new H1.5 geometry. This replaces the previous low and stretched H1 and slightly more upright H2 options. The 56cm model, for example, has an effective top tube length of 559.9mm – we might as well call that 560mm – a head tube of 151mm, a stack of 563mm and a reach of 391mm. Trek says it hits the sweet spot, and I would tend to agree.

The seatpost is an integrated design and is easy to adjust with bolts at the back, but you do want to pay close attention to the manual and the recommended torque settings. The saddle clamp is nice and easy to set up, with individual bolts for adjusting the fore-aft and tilt, and there's a choice of setback to tune your position.

Build

For £10,000, this Trek Madone needs to be the ultimate bike, and it nearly is but for a couple of issues. It's specced with the sort of kit you'd expect on this level of bike, including the Shimano Dura-Ace Di2 groupset, which is flawless.

However, I can't help but question the 50/34-tooth compact chainset on a race bike – surely a 52/36 would have been better, Trek?

The 11-28 cassette is largely standard even on race bikes these days, and I appreciated it on some hillier rides.

Bontrager's Aeolus XXX 6 wheels enhance the aerodynamic performance greatly. They look fantastic and they sound great when you sprint the Madone up to speed. The wide profile provides a good base for the 25mm Bontrager R4 320tpi tyres too, and the wheels are tubeless-ready should you want to ditch the inner tubes. I found the wheels a bit of a handful in strong crosswinds but they were never erratic, you just have to be prepared.

I had zero issues with the Bontrager Montrose saddle nor the two-bolt seat clamp, which as I said above provides easy angle and fore-aft adjustment.

All the parts build up to a 7.7kg weight for the size 56cm bike tested. For comparison, the Specialized S-Works Venge in the same size and with similar parts tickled the scales to 7.15kg, so the Madone is carrying a bit of timber.

Rivals

The Venge is the main rival that springs to mind because it's the aero bike I tested most recently. The Venge is lighter, cheaper (not by much), includes a dual-sided power meter, has more easily adjustable handlebar and stem, and the ride quality is a notch above the Madone. If it was my money, that's where it would be heading.

Other aero bikes we could throw into the ring include the Cervelo S5 Disc and Cannondale SystemSix (we haven't reviewed these bikes yet), Giant Propel Advanced SL Disc (we tested the £3,000 Propel Advanced Disc last year) and Bianchi Oltre XR2.

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The XR2 is a good comparison because it also attempts to provide extra compliance by infusing the carbon layup with a special vibration-damping material, and it does provide a pretty smooth ride. It's not in the same ballpark when it comes to aerodynamics and integration, though.

Another rival comes from Trek itself: the recently introduced Madone SL, which brings the price down by virtue of using cheaper carbon fibre, though it still comes out of the same mould so you're getting the same aero performance and IsoSpeed decoupler. That range starts off at £3,600 which, if you love the look of this Madone but want to save a bit of cash, could be the bike for you.

Conclusion

The Madone SLR 9 Disc is ferociously fast and will enable you to smash PRs and dominate road races, with striking looks, some clever integration and a faultless build, but the firm ride makes it a chore to ride on regular roads at less than race pace, and it's a bit portly too. Those gripes aside, it's a very impressive bike, but I'm left just wanting a bit more refinement and finesse.

Verdict

Seriously fast aero race bike with great handling, but not the smoothest and not the ultimate spec it should be