- Sheldon Brown’s Bicycle Technical Info
One of the most comprehensive cycling sites on the web. This site is particularly useful for fixed wheel converters. - BikeRide
Lots of how-to and diy repair videos - Park Tool repair help
An extensive blog with repair articles. Also, each tool on the Park Tool web site has its own instruction manual! - Bike collective network shop manual
A wiki with a number of repair articles, from beginner to advanced.
