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Tensioned spokes are usually attached to the rim or sometimes the hub with a spoke nipple. The other end is commonly peened into a disk or uncommonly bent into a "Z" to keep it from pulling through its hole in the hub. The bent version has the advantage of replacing a broken spoke in a rear bicycle wheel without having to remove the rear gears.
Dynamo: bicycle lighting component, also known as generator; Eyelet: 1) attachment point on frame, fork, or dropout for fenders, racks, etc. 2) a hole through which a spoke nipple passes through the rim so it may attach to a spoke
A spoke nipple holds a bicycle wheel's rim to each spoke. The spoke nipple is a headed cylinder with threading on the inside through part of its length (there is an unthreaded lead-in nearest the "flats"). Traditionally, the nipples fit in holes in the rim, so that the head of the nipple is on the outermost part of the rim, while the other end ...
Bicycle wheel with wooden rim Nipples Spokes Cross-section of a rim A Shimano Dura-Ace freehub-style hub. A bicycle wheel is a wheel, most commonly a wire wheel, designed for a bicycle. A pair is often called a wheelset, especially in the context of ready built "off the shelf" performance-oriented wheels.
Typically, each spoke is pretensioned to about 100 pounds of force, on an unloaded wheel. When the bicycle is loaded with a rider, then the spokes below the hub have less tension. With every rotation of the wheel, there is repeatedly changes in the spoke tension that can contribute to broken spokes because of fatigue failures.
Commonly used models vary from 18 spokes for racing bikes to 36 for cross-country touring bikes to 48 spokes on tandems and heavily abused BMX bikes. The minimum number of spokes allowed for competition is 12. [1] Some lowrider bicycles use as many as 144 brightly chromed spokes per wheel, although these are not meant for serious riding.