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History
Bicycle drivetrain systems
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Bicycle drivetrain systems are used to transmit power on bicycles, tricycles, quadracycles, unicycles, or other human-powered vehicles from the riders to the drive wheels. Most also include some type of a mechanism to convert speed and torque via gear ratios.
A chain drive and rear derailleur gear change, the most popular system in use today
A chain drive and rear derailleur gear change, the most popular system in use today
A shaft-drive with crankset and rear gear hub
A shaft-drive with crankset and rear gear hub
A treadle bicycle
A treadle bicycle
ElliptiGOs
ElliptiGOs
Tricycle
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A tricycle, sometimes abbreviated to trike, is a human-powered three-wheeled vehicle.
Modern upright tricycle
Modern upright tricycle
Stephan Farffler's hand-controlled three-wheeled wheelchair
Stephan Farffler's hand-controlled three-wheeled wheelchair
19th century tricycle used in Iran
19th century tricycle used in Iran
Girl riding a delta tricycle in 1952.
Girl riding a delta tricycle in 1952.