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Old 2015-12-05, 12:12 AM   #2
Shmolagin
Unicyclist
 
Join Date: Jan 2013
Posts: 3,061
That's not an original idea at all, we use that type of gearing in pumps and meter systems. Google image search "gear rotor pump" and you can see this. It's not really an improvement over a planetary gearing system because of all the vibration, grinding and noise that it introduces. It also requires the inner gear to be off center which is a problem for a unicycle hub unless you want to look like a kangaroo while riding.

I'm convinced that the real reason we don't have a better hub is that we're too much of a niche. If there was a large market for them they would exist.

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