US Patent 11401006 Rear derailleur

A bicycle derailleur mechanism is provided which accommodates larger radial spacing and/or smaller radial spacing having a non-uniform value over the respective winding region. The derailleur mechanism cable pull transmission device may provide over its rotational angular range about the rotational axis, which is effective during operation, a variable transmission ratio as a function of the rotational position of the cable pull transmission device relative to the base component.