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On Test: Specialized S-Works Roubaix SL, April 24, 2007

So good, they named a town after it...

Specialized has long been famous for bringing an edgy perspective to bike design, so when it decided to come up with a bike to tackle the toughest race of them all - the mythical "Enfer du Nord" itself - you just knew it'd come up with something a little bit different from the norm. We've already had a bit of a go on the new Specialized S-Works Roubaix SL at product launches in June and July last year, but that taster only proved to whet our appetites. Cyclingnews' Ben Atkins gives it an extended test to see if the bike lives up to its esteemed namesake.

We really got it together baby...

The Specialized S-Works Roubaix SL
Photo ©: Ben Atkins
(Click for larger image)

What hits you first when you take the Specialized S-Works Roubaix SL out of the box (or see it in the shop window) is the striking, curvy styling. Technically speaking, the Roubaix SL is a semi-monocoque FACT 10r carbon fibre frame, made using Specialized's Az1 carbon construction method. What the company actually did, though, was take the original designs for Marilyn Monroe, combine them with a certain cola bottle, and then stick a wheel on each end - I had to stop myself from asking for the bike's phone number!

Specialized has borrowed some distinctive design features from its Tarmac frame for its top-level Roubaix (especially that bowed top tube) to impart a racier look and supposedly stiffer frame, but has modified the geometry in keeping with the slightly more relaxed theme of the rest of the model line. In addition to the extended head tube, our 56cm test model wears 10mm longer chain stays, a 1° slacker head tube angle, and 6mm more fork rake as compared to the Tarmac, resulting in a fairly rangy 1010mm wheelbase (an increase of 24mm). Evidence of this can be seen quite clearly with the naked eye, in the form of the massive amounts of fresh air visible between the tyres and the seat and down tubes.

Moving away from the front triangle is the area that Barry White would really want to write songs about. Specialized retains the Zertz elastomer damping inserts of the original carbon Roubaix for the new FACT carbon fork and seat stays on the S-Works SL model, but the radical restyling now turn the areas into real works of art. More importantly, however, Specialized claims the curvier styling also adds 5.6% more vertical compliance as compared to last year's carbon Roubaix as well as torsional and bottom bracket stiffness increases of 10% and 2%, respectively.

This is what the fuss is all about
Photo ©: Ben Atkins
(Click for larger image)
The bowed top tube
Photo ©: Ben Atkins
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The FACT carbon monocoque fork
Photo ©: Ben Atkins
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The Roubaix SL's extended head tube
Photo ©: Ben Atkins
(Click for larger image)
… I could stare at these hubs
Photo ©: Ben Atkins
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Zertz all the way
Photo ©: Ben Atkins
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If proof were needed,
Photo ©: Ben Atkins
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How else do you clean a Roubaix bike
Photo ©: Ben Atkins
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The frame is finished in subtler-than-you'd-expect silver and white outline graphics. This scheme is a little minimal for my own taste, but they do give you a chance to admire as much of the carbon as you want to. As the current trend seems to be, there is no obvious weave on display beneath the clearcoat - no matter since that layer is mostly cosmetic, anyway.

The set-up

Our test bike was adorned with a pair of beautiful Mavic Ksyrium ES wheels and an almost complete Shimano Dura-Ace groupset - the exception being the Specialized FACT carbon compact chainset with 50/34T rings. The rest of the finishing kit is an almost completely in-house affair: the SL FACT carbon seat post continues the Zertz theme and also holds the Toupé saddle in place, and the comfort theme is extended to the front end with Specialized's Bar Phat gel pad and tape system. Naturally, those are attached to a carbon S-Works SL handlebar and S-Works carbon stem .

The whole thing amounts to just under 7.1kg (15.7lb) without pedals, which is pretty good considering it's not specifically built to be a featherweight mountain machine.

You've got the Look, but have you got the Touch?

Okay, it looks sexy, it's named after my favourite race, but how does it work in the real world? I've lost count of the number of bikes named after famous cols that would have trouble making it up on top of a car, let alone under human power. After all, just because something has a suggestive name doesn't necessarily mean it's at all suitable for the task it advertises. To be fair, Specialized aims the Roubaix SL squarely at the 'long distance in comfort' market and not just a pavé machine, hence its proud claim that the "Roubaix makes choosing between going fast and going long a thing of the past". Given the bold name choice, though, we couldn't help but feel a responsibility to our readers to properly investigate…

As part of the test, I managed to persuade a few friends to come with me on a bit of pre-Classics reconnaissance, where we'd ride the climbs of Flanders and the cobbles of Roubaix - all in the name of research, of course! The weekend was neatly divided in two as we'd travel to Belgium on Saturday and do as many of De Ronde's climbs as we had time for, then an early start on Sunday would see us attempt to ride all of the cobbled sectors from this year's Paris - Roubaix. In all, the weekend was to total something close to 300km (186mi).

This may seem a bit extreme, but there was a kind of method in my madness. This bike is designed to eliminate as much road buzz as possible, and there are no roads in the world that I know of that buzz like Roubaix cobbles. If I could do a good distance over these roads and still feel relatively fresh, then the bike must be doing something right.

We managed our 300km of Flanders and northern France, and despite the fact that it was pretty much nighttime by the time we reached the Roubaix velodrome, I have to say that I still felt surprisingly fresh. Make no mistake, the cobbles were still very tough to ride, but the Roubaix SL definitely absorbed the very harshest sting of each one, making the passage from one stone to the next much less of a leg-sapping experience than I've experienced on stiffer bikes. Consequently, even as we traversed the last few sectors, and covered the last few kilometres through Hem and into the outskirts of Roubaix, I was able to keep applying the power all the way to the finish line.

Back in the real world on my usual training routes, this slight damping of cobbles translated well to the smoothing of the worn tarmac surfaces of the roads of Sussex. Training rides were as tough as usual (and my legs were still sore), but the Roubaix's excellent buzz-eliminating properties noticeably lessened that non-specific fatigue that I often feel after a ride.

So the frame is compliant and forgiving in the vertical plane, making long rides more comfortable, but this is no use if it also flexes laterally, thus wasting your carefully applied energy. In this department, I also found the Roubaix SL to perform outstandingly. Not being the world's greatest climber, I tend to grind a bigger gear than perhaps I should, and so I generally notice if the bike is flexing. On short sharp power climbs and longer drags alike, I never felt the bottom bracket sway at all even when out of the saddle. Moreover, there was no perceptible twisting at the front end -either from the frame's front triangle, or from the über stiff bars and stem - nor did I ever get the sensation that the chain stays were bending under load.

The wheels - despite being more what you'd describe as a climbing wheel - took everything I threw at them in stride (even fifty-odd kilometres of the roughest surface in Europe!) and remain as straight and true as when I first put them on. The Dura-Ace groupset was as predictably predictable as you'd expect - it's so good, in fact, that I have a theory that Shimano has to make the styling as outlandish and controversial as it does because otherwise you might forget it's there.


Even with my fussy head on there's still not much to find wrong with the Roubaix SL. From a fit for purpose perspective it pretty much ticks all the boxes: it makes the pavé of northern France and Belgium a bit more palatable, but it also satisfies the more general role of making riding long distances a forgiving experience without compromising performance.

Aesthetically, I reckon it's one of the best-looking frames out there; the subtle graphics and clearcoat finish is beautifully understated and has so far resisted chips and scratches. The only criticism of the overall look I can make is that the rear brake cable looks a little bit strange stretched straight as it is below the bowed top tube.

About the only thing I did find wrong with the complete set up was the fact that it comes with a compact chainset and a 12-27T cassette. Even for the bergs of Flanders, and a non-climber like me, the lowermost 34x27T combination is a bit small, and the large range of sprocket sizes necessitates bigger gaps than is ideal.

In all, this is a great bike, well worth it if you want to race or ride all day, but still have the energy to go for a beer afterwards.

[Many thanks to the Velo Club de Roubaix and Les Amis de Paris-Roubaix for granting me access to the Roubaix velodrome.]

Weight: 7.1kg (15.7lb) (w/o pedals or bottle cages)
Price: US$6000
Pros: Stiff, yet comfortable; great looking; very light; virtually unstainable bar tape
Cons: Gear ratios a bit small; rear brake cable looks a bit strange
Cyclingnews rating: Click for key to ratings


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Images by Ben Atkins/Cyclingnews.com

Images by Jay Chisnall/Cyclingnews.com

Images by Ben Atkins/Cyclingnews.com

Full Specification

Frame: S-Works FACT 10r carbon, Az1 construction, Zertz inserts
Available sizes: 49, 52, 54, 56 (tested), 58, 61cm
Fork: S-Works FACT monocoque carbon fork; full carbon legs, crown and steerer w/ Zertz inserts
Headset: S-Works Mindset, 1 1/8" integrated threadless
Stem: S-Works FACT carbon stem, 31.8mm handlebar clamp
Handlebars: S-Works SL FACT carbon aero Handlebar, short-reach Drop, 31.8mm clamp
Tape/grips: Body Geometry Bar Phat w/ 2.5mm gel padding
Front brake: Shimano Dura-Ace BR-7800
Rear brake: Shimano Dura-Ace BR-7800
Brake levers: Shimano Dura-Ace ST-7800
Front derailleur: Shimano Dura-Ace FD-7800-B
Rear derailleur: Shimano Dura-Ace RD-7800-SS

Shift levers: Shimano Dura-Ace ST-7800
Cassette: Shimano Dura-Ace CS-7800, 12-27T
Chain: Shimano Dura-Ace CN-7801
Crankset: S-Works FACT carbon crankset, 50/34T, 172.5mm
Bottom bracket: S-Works oversized integrated bottom bracket
Pedals: not included
Wheelset: Mavic Kysrium ES
Front tyre: S-Works Roubaix, 700x23/25c
Rear tyre: S-Works Roubaix, 700x23/25c
Saddle body: Geometry Toupé Gel
Seat post: S-Works SL