crankset

noun

1. The component of a bicycle drivetrain that converts the reciprocating motion of the rider's legs into rotational motion used to drive the chain, which in turn drives the rear wheel.

   “Crucial to the crankset is the bottom bracket. Of all the bearings on a bike, the bottom bracket is the one that has to bear the heaviest load. Not only does the bottom bracket have to spin while you pedal, but it takes the force of all the twisting and turning that occurs during pedaling.”

   “Their owners lounge at the outdoor tables, kibitzing about cranksets, aero bars, local races or, when they can help it, anything other than cycling.”