Chris Boardman's aerodynamic knowledge has been put to good use to create this full carbon race bike.
During his professional career Boardman rode several unique tt bikes (made by Terry Dolan but stickered up as Merckx's) in to which he had a significant input, but it has been in his post riding years that he has truly pushed the boundaries. In the build up to the 2008 Beijing Olympics Boardman spent hundreds of man-hours in wind tunnels getting Great Britain's riders' positions and equipment as aerodynamic as possible.
He did the same again in the build up to London 2012 but the work was kept under wraps to allow the British team to fly below the UCI's radar. (They were determined to enforce the principals of the 1996 Lugano Charter that highlighted the risk posed to cycle sport by spiralling costs of equipment and unequal access to technology that gave the richer teams and nations an unfair advantage over the poorer ones.) A lot of knowledge that Boardman gained during his British Cycling based research has unsurprisingly filtered through to his range of bikes.
Several characteristics of the 9.8 remind me of the UKSI bikes the GB team ride. The forks for example are bigger and bulker than the GB team's pursuit forks, but their overall look - and I suspect their profile and width to depth ratio - is very similar. So too are the seat stays at the back.
The main similarities between this bike and the GB track bikes are undoubtedley the clean lines. Each tube on the Aero 9.8 is in a straight line. Why? Because the most aerodynamic route from A to B is a straight line. The profiles of those straight tubes are then shaped where they can be (staying within the UCI's 3:1 ratio rule).
There are of course compromises on a mass produced aero road bike that you don't encounter on a track bike tailor made for an individual rider. The cables coming down from underneath the bar tape ruin the frontal area (in aero terms) but there are few alternatives.
The Cervelo S2 and S5 are the only aero road bikes providing a genuine alternative, but even they haven't yet come up with an areo solution for the front brake cable. Only TT bikes (with calipers mounted behind the fork crown) have. On the 9.8 the gear and rear brake cables do tuck neatly in to the frame at the head tube. This also means the frame is ready for electronic groupsets (to be included in the 2013 range).
Obvious aero tubes are the big down tube and seat tube. The seat pin follows this profile although the aesthetics are spoilt by the slightly clunky clamp. Other manufacturers have much neater versions (the Scott Foil for example) but you could argue they have little aero benefit as it's not an area that comes in to contact with clean air.
It is unfortunately impossible to truly asses a bikes aeroydynamic properties without taking it in to a wind tunnel, and as Cycling Weekly's budget doesn't stretch that far all we can do is tell you how it rides. That is, unsurprisingly, very well.
Take a look at that downtube, the size of the bottom bracket area, the square chain stays, and you wont be surprised to learn that it is an incredibly stiff bike - perhaps one of the stiffest I've ridden. There is almost no nod towards softening the ride (apart from carbon's natural properties) but this isn't the aim of this bike.
Handling wise the bike is everything you want from a race bike. The straight bladed forks set with a head angle of 72.5 degress (on the small/medium sized bike) are as rigid as the rest of the bike giving quick, direct steering without a hint of twitchiness.
Unfortunately we didn't get to keep the Zipp 404's that came with the bike - they were just for show - so rode instead with some Mavic Ksyrium Equipe S's (it is a shame to ride a bike like this without deep section wheels in). When riding a time trial on the bike I put on some deep section carbon wheels (Pro Lites, budget deep sections, but good all the same). Those along with some clip-on tri bars turned this in to a very fast bike. If you're after a road bike that you can also time trial on this is just what you're looking for.
The 175mm cranks helped here too, although that's the only place they helped. I normally ride 170mm cranks, or, at a push, 172.5mms, but couldn't get hold of a BB30 set quick enough so made do with the longer ones. Great in time trials or on the flat when pushing the pace, not so great for accelerating or climbing short sharp hills, or spinning little gears. Had I
The 9.8 came with SRAM Red, if you want Shimano you'll have to go for the 9.4 that comes with Dura Ace (and cheaper carbon wheels and a white paint job), next year there will be an electronic version.
This is an out and out racing bike. It's fast and it's rigid and is designed for competition. The bikes aerodynamics characteristics come from the mind of one of the most knowledgable minds in the field so they have to be taken seriously. Ridden with a set of deep section wheels makes for a bike that is as well suited to time trials as well as road races. Thankfully the handling means it's as agile in the latter as it is fast in the former. If you buy with the Zipp wheels you will need a spare set for general riding, as those should be saved for the races.
Mavic Ksyrium Equipe S wheels
AiR ultralight full carbon monocoque
52/42 with 12/23
XS (52.5cm) - XL (58.5cm)
Zipp 404 Firecrest tubular (not ridden)
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