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Old 2017-02-02, 11:56 PM   #91
aracer
Registered Unicyclist
 
Join Date: Oct 2011
Location: Worcester, UK
Age: 49
Posts: 1,807
It's likely that wires would work fine for this application as there's always a part of a geared hub which is fixed to the frame and you could have all of this shifter mechanism attached to that with wires feeding in direct from the frame. Particularly if using a solenoid type mechanism where the moving part floats free, so could be attached to a different part of the hub.

BTW, not that I'm sure how it's relevant, but I'd be confident that the motors used in shifters on bikes use the same technology as servos - though they will be completely custom rather than off the shelf. All that effectively means is that there's an integrated sensor feeding back the position and the motor is powered until it reaches the correct position.
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