Chainring set
As crankset , crankset , crank set or crank system (also crank set ) is at the bicycle consisting of one or more chain rings and cranks designated existing unit. It is used to transfer the torque from the bottom bracket shaft to the chain. This transfers the power to the ring gear on the rear wheel.
In addition to single chainrings, there are double and triple chainring sets. The triple sets came up with the mountain bikes at the beginning of the 1980s; until then, double sets were only available on racing bikes. Several chainrings are required if the switching capacity of the (rear) derailleur is insufficient. To operate the front gear shift, headers were originally used (simple levers on the seat tube), but front derailleurs with Bowden cables have been common since the late 1960s . These derailleurs were initially attached to the upper third of the down tube, and it took some getting used to to operate. In the mid-1980s, the switches were moved to the handlebars. A few years later, brake levers for racing bikes came onto the market. Other bicycles today have either rotary shift handles to operate the derailleur or differently designed shift levers.
See also
literature
- Fritz Winkler, Siegfried Rauch: Bicycle technology repair, construction, production. 10th edition. BVA Bielefelder Verlagsanstalt, Bielefeld 1999, ISBN 3-87073-131-1