Glossary

A glossary of bicycle and bicycle parts and their functions.

Aero Wheel

A wheel designed with reduced wind resistance.See also: Air pressure

Air pressure

The amount of compression of the air in a bike tire. The tire pressure reduces the rolling resistance, and provides suspension to the bike, increasing the comfort of the ride. In the U.S. pressure is usually measured in pounds per square inch (psi). The typical modern fat tire rates at a pressure of up to 65 psi. The typical thin tire rates up to 100 pounds per square inch. The exact recommended pressure varies from one model of tire to another, and is typically imprinted on the side of the tire. The European air pressure measurement is expressed in “bars.” This refers to multiples of standard barometric pressure. See also: Aero Wheel