The shop I was at yesterday recommended that I try 58's. I've always wondered b/c my torso always felt a little scrunched on my 56 but anyplace I ever went always said that I should ride a 56. The guy that recommended the 58 to me (shop owner) just happens to be pretty much my clone in terms of physical dimensions. He said everybody always had him riding 56 but he feels more comfortable on the 58. This guy is worlds beyond me in skill and expertise so I was kind of glad to hear him suggest something that I had always wondered about.