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That crank is unusual and therefore it is hard to give you advice. It shouldn't be the bearings because they don't usually make a big noise, but rather make the crank harder to move around (you can perfectly feel bad bearings if you try moving it with your hand and feel resistance/side-to-side movement). Can you install the crank without the clutch ...


I've had a direct drive hub motor and the latest is a geared hub motor, the geared is much smaller, lighter and faster with better low speed torque and easier on the battery.

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