San Diego:
Pedal Pushing Bicycle Shop
4966 El Cajon Blvd
(619) 583-2043
A selection of new track parts, lots of pickings for conversion frames and parts. Good pricing, and Dave is super friendly and helpful. Usually some cool bikes hanging. Great for getting a conversion built up on the cheap.
Thomas Bike Shop
1635 Fern St
619.232.0674
Cool little shop, some nice random track parts, a few beautiful complete bikes hanging, and good friendly help.
Adams Ave Bike Shop
2606 Adams Ave
619.295.8500
Higher end parts, caters to local velo riders. Great all around shop. Always willing to help you with a fixed gear.
What san diego doesnt have (and I wish we did) is a co-op