Wenn die Kette abspringt oder klemmt: Unterschied zwischen den Versionen

A chain deflector, such as the N-Gear Jump Stop Chain Guide (right) can prevent the chain from coming off the inner chainwheel.

A cyclocross ring (like a chainwheel without teeth -- you can make one by grinding the teeth off a worn chainwheel) helps to keep the chain on the chainwheel -- but is not possible at the inside if there is more than one chainwheel. An outside cyclocross ring also helps keep chain dirt off your clothing. It is preferably installed outboard of the normal position of the chainwheel -- using a triple-chainwheel bolt set if there are two chainwheels on the outer bolt circle of the crankset. A cyclocross ring and a chain guide. as shown below, are especially helpful on Bike Friday's folding bicycles, where the chain loses tension as the bicycle is folded.