Well, I think have a 12 - 32. I started with the 12 - 25 and it was fine if I was riding just one sustained 3 - 4 mile climb. But if I wanted to ride more than one hill - my joints just couldn't take it. I have to be really careful to get fully warmed up before I try to ride in a big gear. Bad knees. The leg muscles say, "What? we can do this!" But the knees don't like it.

Veronica