Abstract: An at least two-wheeled vehicle provided with a power source, a chain to transmit power from the source to a first wheel, and further device to transmit power from the first wheel to the second wheel. A torque-limiting clutch is provided in the mechanical connection between the two wheels which will predetermine the maximum torque which will be transmitted from the first wheel to the second wheel. This clutch also permits the first wheel to travel faster than the second wheel, when required. There is also provided a free-wheeling clutch in the mechanical connection between the two wheels which permits the second wheel to rotate faster than the first wheel. The core of the transmission has the ability to absorb and release torque applied to it. The present invention provides improved traction and better steering ability.

Abstract: The saddle has a broad rear section, a narrow front section and a frame and saddle cover. To make the saddle more comfortable and prevent injury to the cyclist, the front section can be slid, facing rear section downward and forward against a pre-stress.