eBike Freewheel Crank Set
These threaded freewheel crank arms are used in ebikes and 80cc or oil powered bikes to have the crank arms stay stationary while the wheel turns by installing a freewheel on the crank arm itself. Normally the motor will turn the wheel and in turn, drive the chain connected to the front sprockets and have the crank spinning which makes the bike not ride-able but this crank, with freewheel installed on it, it can handle the motor chain driving the front sprockets while the crank arms stay still. This crank is made for mid-mount kind of kits and 80cc kits but it can be used on any installation you want too and yes, the right crank is threaded so you that you can mount freewheel on it.