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Levers) Shifters, crankset (the pedal levers), derailleurs, handlebars, freewheel assembly, brakes

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Levers) Shifters, crankset (the pedal levers), derailleurs, handlebars, freewheel assembly, brakes.

Wheel and axel) The wheels, pedals, crankset, cassette

Pulleys) Parts of the shifting mechanisms, braking mechanisms, and the drive train (chain on gears).

Screws) (Hold parts together).

Wedges) The teeth on the gears. Not common, but some gooseneck assemblies (where the handlebars attach to the front fork tube) may employ a wedge to tighten the connection. If you have a repair kit on your bike, tire levers are also both levers and wedges.