is there any motor that have a traction on crankset ?

Geekb0rg

New Member
Dec 9, 2021
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Hi,
I checked many 80cc motors for bicycles on aliexpress but all the models does have a "rear" wheel traction.
I don't like this design because it does not allow a rear disc brake.

is there a model where the motor chain is located on the crankset instead ?