Abstract: A device for retarding a bicycle having a braking system, the device incls an additional braking device independent of the braking system of the bicycle. A brake is associated with the additional braking device and a traction lever is provided for controlling the additional braking device which is adapted to be locked in a cable traction position. Transmission control cable is connected between the traction lever and the brake for controlling the additional braking device, and a force limiting device is positioned between the lever the additional brake for adjusting the additional braking device.