interesting info for the aero weenies. fork/handlebar saved more drag than the frame
srchttps://docs.google.com/open?id=0B17X8q ... TBDVVFUazQ
The KVF tube shape allowed Trek to decrease overall bike wind resistance.
Trek relied heavily on KVF shaping on the head tube, down tube, seat tube and
seatstays. This reduced the frame drag by 60 grams, while simultaneously
improving the structural performance of the frame.
One of the most important components on a bicycle in terms of aerodynamic drag is
one of the first things to see the wind: the fork. Trek attacked the problem with two
key technologies: the KVF tube shape on the legs, and the integrated front brake. Trek
engineers started with the aerodynamic performance of Speed Concept’s 3-to-1-ratio
KVF tubes for the upper portion of the legs, and then blended to a 2-to-1 ratio for the
lower legs for improved performance and weight. The combined effect of optimized
aero shape and integrated front brake decreased aerodynamic drag by 76 grams.
The other key component on the front end of the bike to significantly affect
aerodynamics is the handlebar. Trek engineers applied KVF tube shaping to
the center sections of the handlebar to further reduce drag by 90 grams
your local trek dealer should have copy..whitepaper available on trek's dexter dealer site.