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Build-Break-Fix posted on r/motorizedbicycles4w
Freewheel link https://a.co/d/0f3mAPmn Hub link 15mm https://a.co/d/0f3mAPmn This is a 2 part system. Mount the hub on shaft and spin the freewheel onto it. And attach desired sprocket size you need or already have. Everything you need comes with this 2 items. Including the shaft key that slides in shaft in the slot