Originally Posted by
Sy Reene
No link, but gotta wonder a little bit, why would a disc braked TT bike be faster than a rim-braked bike on a typical flat course.
Well, if there are aero differences between disc brakes and rim brakes, the difference is small.
Somebody (who happens to work for Cannondale) did some wind tunnel tests on a TT bike (made by Cannondale, of course) and found that for most yaw angles, disc brakes on that frame were very slightly more aero than rim brakes:
Disc and Rim Brake Aero Drag