2012 Specialized Crux Comp Frame & Disc Specifics

As is nearly standard on current road and cross racing bikes, the steerer tube is tapered from 1-1/8″ to 1-1/2″.   This serves not only to ‘balance strength, stiffness and compliance’ but in my opinion tapered steerers/headtubes help reduce infamous brake chatter on cantilever equipped bikes.  Call it a hunch, but I’m sure disc brake equipped cyclocross bikes benefit from the tapered steerer when dealing with asymetric forces from braking as well as the usual gamut of tight turns, bumps, barrier hops and more from the race course.  Nic Sims tells me the fork is an all new design and boasts a new carbon lay-up to help deal with brake loads.

The workhorse drivetrain along with relatively tall chainstays, squared off seat-tube, BB30 bottom bracket and ovalized downtube.  AND trick matching red cable housing…

This shot gives a better view of the seat tube – round at the top transitioning to square cross-section towards the BB, and the BB30 bottom bracket/crank interface which shaves weight and offers a narrower stance (along with more heel clearance) than external cup designs (Hollowtech, GXP, Mega-Exo).


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