Bicycles FAQ - Index of road and mountainbike Usenet FAQs.
Bike Parts by Biker's Barbecue - A useful and entertaining check list of bike parts and accessories one should consider taking along on a bicycle trip.
Bloom Bike Shop - Provides bike repair and maintenance information for cyclists and business information for shop owners. The team, directories, guides, and theft prevention information.
HowStuffWorks: How Mountain Bikes Work - Article containing photographs and animation that helps to explain gears, derailleurs, suspension, frames, brakes and general information. By Karim Nice
Interactive Cycling FAQs & Answers Site - A subordinate offering of Interactive Cycling, this site offers FAQs and How-To files covering several facets of cycling and bicycle maintenance.
BMX
BMX Basics - Offers a wide variety of news, photos, monthly columns and stories, how-to's, and getting started in racing resources.
BMX Stunts.com - Database of how-to's, videos, pictures, bios, online contests, products and general information.
BMX Tricks - Written instructions on how to perform a variety of BMX tricks.
X-Treme Trix - Tricks for the beginner or the advanced biker.
Maintenance
Harris Cyclery - Articles about bicycle repair by Sheldon "Fixit" Brown.
Ask the Mechanic - Andy the Mechanic, AKA Andy Wallen, fields technical and bicycle fix-it questions.
BikeWebSite - Step-by-step guides for bicycle tune-up and repair. A comprehensive, illustrated, online bicycle repair manual.
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.
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.
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.
Sturmey Archer SW Hubs - Hints and tips for maintenance and repair of the "silent" Sturmey Archer hub.
Sheldon Brown - Building bicycle wheels by Sheldon "Wheels" Brown
Wheel Building - Building bicycle wheels with mixed spoke patterns.
Maintenance Tools
Balle Racing - Specializing in downhill mountain bike tools and parts, such as brake lever removal tool for Hayes hydraulic brakes.
Fit Kit - Manufacturer of bicycle fitting devices; enables dealers, coaches and trainers to find the line of best fit for a rider to their bicycle.
FitStik Bicycle Fitting Tool - Lets you duplicate riding position on any bicycle. Also for initial bike fitting. Used by bicycle shops, clubs, training, spin classes, coaches, racing, triathlons.
Morningstar Tools - Manufacturer of tools for freehub maintenance, disc rotor, wheel and frame alignment. California, USA.
Park Tools - Offers a complete line of maintenance tools for the bike shop or the home bike mechanic. Offers tool tips, recommended tools for the home bike mechanic, bike maintenance education and school programs, and contacts. Based in Saint Paul, Minnesota.
PréciRay - Wheel centering stand for bicycle maintenance. Features overview, instruction manual, video, resellers and contacts. Language options include English, French, German and Dutch.