Oh heck, most of my super tough friends have a 27 on the back of their compacts, and you can do that with a regular road derailleur. I've got a 30T puppy ring up front on my stock triple, and the year I did Fall Challenge I put a 27 on the back and it made all the difference in the world over the stock 25. 34x25 is NOT for the faint of heart in Ohio. No wonder she's discouraged.
But, she needs good shifting technique and the ability to go from sitting to standing, too. How's her technique?
Last edited by OakLeaf; 03-11-2013 at 01:04 PM.
Speed comes from what you put behind you. - Judi Ketteler