For the Marcel Duchamp sculpture, see Bicycle Wheel.
A bicycle wheel is a wheel designed for a bicycle. A pair is called a wheelset, especially in the context of performance-oriented wheels. A wheel consists of a rim connected to the hub by spokes. At the end of each wheel spoke is a nut, called a nipple. Bicycle wheels connect to the frame and fork via dropouts.
The hub uses bearings to reduce friction with the axle. Except in fixed gear bicycles, the rear hub is connected to the freewheel and the rear sprockets. Some bicycle wheels are attached using a ...
For road bicycle racing performance there are several factors which are generally considered the most important:
weight (for this article equivalent to mass)
rotational inertia
aerodynamics
hub/bearing smoothness
stiffness
Semi-aerodynamic and aerodynamic wheelsets are now commonplace for road bicycles. Aluminum rims are still the most prevalent, but carbon fiber is also becoming popular. Carbon fiber is also finding use in hub shells to reduce weight, although some argue that its proximity to the center of rot ...
Bicycle wheel - 26-inch/ISO 559.
26-inch clincher tires (with inner tubes) are the most common wheel size for mountain bikes. The typically 26er rim has a diameter of 22.0" (559mm) and an outside tire diameter of about 26.2" (665mm) Increasingly tubeless tires are becoming more popular. Tubeless tires are often called by the acronym UST. UST tires allow the rider to run lower tire pressures for better traction and shock absorption without risking puncturing the tube in convential bicycle tires.
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