Also, I strongly suggest that you buy from a local shop where you can try before you buy. Especially being that Trek sizing is a bit wonky. I ride a 57-58 on most bikes, but the 60cm T1 fits right. I think it's how they measure things. Pay close attention to the Effective Top Tube measurements. The differ by 3cm. The 60cm has an ETT of 56.8cm, a 3.2cm difference!