Subject: RE: Road Bike to Tri Bike Sizing Depends on the frame and your fit. I ride a 58 Scott for my road bike and a 58 Felt for my TT bike. Could I have gone with the 56? Sure, probably and been in an even more aggressive position. But I got the 58. The only real reason to go smaller is for positioning. If you cannot get a good and powerful position on a size, you change to another. |