Originally Posted by Rikardi151
Im looking at the size measurements on the IRO website, and they don't quite make sense to me since its different geometry... the bike I have now fits me fairly well, and has a 32" standover and a 56cm TT The ST measurement makes no sense because of the higher BB. Would I need a 56 or a 59? I am about 5'10"-'11", and heavy but of otherwise pretty normal proportions.
Keep in mind that the measurments listed are c-t. For C-C measurements you need to subtract 4. SO the 59 really is a 55 and should fit you fine. I am 6' and ride the 62 which is really a 58.