Bicycle drivetrains

part of the drivetrain on a bike

bicycle part that connects the crankset (chainset) to the bicycle and allows the crankset to rotate freely

thumb|Shimano 600 front derailleur (1980)

thumb|A Shimano 105 crankset with two chainrings on a road bicycle right|thumb|A Shimano Deore right crankset, showing crank arm, spider, three chainrings and chainring guard thumb|right|Belt-driven bicycle|Belt-drive crankset on a Trek District

used to transmit power on bicycles, tricycles, quadracycles, unicycles, or other human-powered vehicles from the riders to the drive wheels

thumb|right|Biopace triple crankset, a non-round crankset thumb|right|The Biopace logo on a chainring Biopace is a tradename for a type of ovoid bicycle chain ring manufactured by Shimano from 1983 to 1993 The design was intended to help overcome the "dead zone" where the crank arms are vertical and riders have little mechanical advantage.