My cool cousin MikeNachtwey.com gave me his sweet, custom cyclocross Ritchey, from the mid-eighties, with an extra set of road rims. The rear wheel has a fixed/free Phil Wood hub and Avocet crankset. This bike is light (21 lbs.) and I can set it back up as a 21 spd. off-road ride in 20 minutes. I ride it fixed.