Quote Originally Posted by OakLeaf View Post
Yes, how tall are you (not that that's the only factor, but it's a clue)? 172.5 is way long for most women.

I'm 5'3" with short femurs, and crankarms longer than 165 mm make my kneecap tracking problems flare up something awful.

Until you get a proper fit, try stretching your knees by kneeling with your butt on your heels for a minute or so before each ride. That used to help me.
I'm only 5'4"! Eep!