This model will not work on a 10-speed for any emergency repairs, and chain cutting would be necessary for it to work in either 2-2 or 1-1 both high gears. Maybe if they put a guide tract on it, it could work as a manually adjustable 10 speed guide wheel as only listed gears align straight. May get some more for fixed gear, and cruisers that chain always falls off. Also fit 3s speed internal hub systems with some difficulty.
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