A bicycle pedal is that part of a bicycle that the rider pushes with his or her foot to propel the bicycle. It provides the connection between the cyclist's foot and the crankarm allowing the leg to turn the crank. Pedals usually consist of a spindle that threads into the end of the crankarm and a body, on which the foot rests or is attached, that is free to rotate on bearings with respect to the spindle.
Pedals were initially attached to crankarms connecting directly to the driven (usually front) wheel. The bicycle as we know it today came into being when the pedals were attached to a crankarm driving a ring gear that transmitted power to the driven wheel by means of a chain.
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