A.5.3. Schlumpf - drives for handbikes
A very popular application are handbikes. mountain-drives for use on handbikes come with a special shifting shaft, which is configured for lower pressure at changing gears.
Big advantage on a handbike: you can always shift, either at full speed as well as at standstill!
For higher speeds, no problem to use a speed- or even high-speed-drive on a fast handcycle.