Bicycle Maintenance Guide - Summary of what an experienced cyclist has learned over the years. Ask the Mechanic - Andy the Mechanic, AKA Andy Wallen, fields technical and bicycle fix-it questions. ProMechanics.com - USA Cycling's advisory board for bicycle mechanics provides this site on how to become or locate professional race mechanics. Also, includes resources for the mechanic. Chain-Suck in a Nutshell - Chain-Suck binds chains onto the teeth of chain-rings, and brings pedalling to an abrupt stop. Find out why, and how to resolve the problem. Mountain Bike Repair - Step-by-step bike tuneup and repair with color photos. HPV Drivetrain Analyzer - Drivetrain evaluator for bicycles, tricycles and other HPV's that use chains, sprockets, geared cranks and hubs with 1:1 power transfer to environment, ie wheels rather than screws. BikeWebSite - Step-by-step guides for bicycle tune-up and repair. A comprehensive, illustrated, online bicycle repair manual. Harris Cyclery - Articles about bicycle repair by Sheldon "Fixit" Brown. Bicycle Maintenance Guide and Riding Tips - Contains maintenance tips and tutorials categorized by topic.