A bicycle chain connects the crankset to the cassette and allows the rear
wheel to turn when pedaling. A strong yet flexible chain is
important so that it is able to shift back and forth without
snapping. The width of the chain depends on the number of speeds
available; in general, more speeds means a narrower chain, while a bicycle
with fewer speeds requires a wider chain. The chain is located
on the right side on most bicycles.
Wear and tear causes the chain to stretch and the distance between each
link to become longer, so it is important to check and replace the chain
when necessary. When replacing a chain, the cassette should also be
replaced at the same time, as an old cassette will quickly wear out a new
chain. As long as the chain is replaced within the recommended time,
the chainrings will not typically need replacing. The chain should
be kept lubricated with bicycle chain lube.
Browse the listings below, and shop for new and used bicycle chains at