Thread: Shimano Free wheel compatibilty advice needed
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Old 03-16-18 | 02:27 PM
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JohnDThompson
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Originally Posted by n0+4c|u3
Don't know where you're sourcing your parts, but if you're looking for used, before hyperglide there were twisted tooth SIS 6 speed freewheels.

either will work, but the hyperglide freewheel will shift much better.

John D. posted a picture of a hyperglide freewheel above. Notice the ramps cut into the side of the cogs? The original SIS freewheels didn't have this feature.
Nobody makes Uniglide profile freewheels anymore, but you can get SIS-compatible Hyperglide freewheels.
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