Category
page 1Bicycle drivetrains
bicycle chain
part of the drivetrain on a bike
bottom bracket
bicycle part that connects the crankset (chainset) to the bicycle and allows the crankset to rotate freely

derailleur
thumb|Shimano 600 front derailleur (1980)
crankset
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
bicycle drivetrain systems
used to transmit power on bicycles, tricycles, quadracycles, unicycles, or other human-powered vehicles from the riders to the drive wheels
Biopace
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.