Quote Originally Posted by Becky View Post
I'm interested to hear more about this and learn a little more. My Bianchi is a 49cm with a compact, and I've ridden other small bikes with compacts. No problems that I could find...

There are some limitations to compacts when in the small ring, due to the 14- to 16- tooth drop between rings and chain drag across the larger ring when cross-chained (but you shouldn't do that anyway!). The shorter wheelbase of a smaller bike exacerbates this. As long as I'm careful about planning my shift to the big ring, it's not been too much of an issue for me.

What issues have they run into?
That's pretty much it exactly.