Chainstays on the Karate Monkey are 431mm. I used to ride a cross check with axiom lasalle (medium-large) panniers. The chainstays on the cross check are 425mm. My feet are 11's and I never had an issue with heel strike. You should be fine. I want a karate monkey too.
Last edited by jmichaeldesign; 05-16-09 at 12:38 PM.