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The freewheel is a ratcheting mechanism, that coupled with a set of gears, is that threaded onto the rear hub of a bike. The freewheel allows the rear wheel to engage and move when the pedals are spun forward, but coast freely when the pedals are stationary or spun backwards.
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What is the difference between a freewheel and a hub?
I think these are both just types of cassettes, one all the rings come apart, and the other it's just one big piece all welded together.
Can someone please tell me what the difference is?