Actually, commuters may be more prone to fix their bikes... I usually cannot justify leaving my bike in LBS for several days, waiting for repair. I need it to commute! So I have had to try and learn something about repairing the simple things myself. It is a slow process, and I probably spend at least twice the time a competent mechanic would need at any given job, but I get it done and the bike will be rideable the next morning.

--J