Quote Originally Posted by aicabsolut View Post
I've never seen a 50/39 combo. Isn't a 50T usually 110BCD? Maybe she could put on a smaller inner ring?
The specs says it's Shimano 105 (5500). Those are the smallest rings that will go on it. It'll accept a 42 small ring and a 52 or 53 big ring, but nothing smaller than what she has, unless maybe some aftermarket chainrings will fit.