Most torque converters have a stall speed around 2000 - 2500 RPM. Which also happens to be the RPM range that your vehicle normally runs at cruising speed. At a lower speed you would be simply running a viscous coupling between the engine and transmission.
Then, thereâs the obvious choice: A dynamo attached to one of the bike wheels. (These devices in general are called generators, but when attached to a bike, a generator is traditionally referred to as a dynamo.
Shimano Pedaling Dynamics. Shimano Pedaling Dynamics, also known as SPD system is a design of clipless bicycle pedals. The SPD pedal was released by Shimano in 1990. While not the first, its innovation was its small cleat which fitted in a recess in the sole of a shoe designed for SPD use.