The bicycle industry's leading technical school offering classes in bicycle mechanics, certification, and frame building, serving the bicycle industry since 1981.

Building Bicycle Wheels, by Sheldon Brown.

Bicycle mechanics school, specializing in suspension service and wheel building and truing techniques.

Gear Inch & Shifting Pattern Calculator An essential tool for cyclists interested in calculating Gear Inches & Sequential Shifting Patterns based on chainring & freewheel combinations. About the Cycling Calculator Multi-speed and Single-speed mode Previous Releases of the Cycling Calculator Calculate in Multi-speed mode (Road bikes, mountain bikes, tandems, etc.) Calculate in Single-speed mode ...

A formula for determining the optimum crank length for bicycles.

Materials: New tire, new inner tube, flat head screwdriver Tire Repair Procedure 1. 2. 1. Assess the degree of damage. Your flat may require a new tire or just a new inner tube. 2. If your tire shows threads, flaking, or peeling, it must be replaced. (The tire above is peeling and has become so thin that a rock has punctured the inner tube). 3. 4. 3. The tire must first be detached from the ...