Originally Posted by
Paul Barnard
My two points are that you can't arbitrarily say that a hybrid has a longer effective top tube and that even if there is a difference it is likely inconsequential.
Fair enough, but I said for the same frame size. A 20.5" Trek hybrid frame would be closer to a 52cm road bike frame (actual BB-ST measurement, I know sloping top tubes muddy the waters here.) BTW, I ride a 20" 7.5FX and the equivalent of a 54cm traditional road bike and the TT is 23mm shorter on the road bike. There is way too much variation in types of frames and geometry to make a generalization that covers every scenario.