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Old 2018-02-04, 05:30 PM   #4
one wheeled cycling
finnspin's Avatar
Join Date: Nov 2008
Location: Lüneburg,Germany
Posts: 866
Originally Posted by rich View Post
Aren't most (all?) the multi-gear IGH systems like Rohloff based on each gear overdriving the others? How can that work in both directions such as for a unicycle?
You'd end up with multiple forward speeds and only one fixed ratio (or a freewheel) for reverse torque.
The gearing itself does not care which way it is turned, the only thing that does is the freewheel integrated into most Geared bicycle hubs. If you eliminate the freewheel, any conventional gears don't care which direction you turn the input shaft, the output will always spin with the (rotational) speed of the input shaft divided by the gear ration.
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