I believe this is the mxus version of a crank drive system available here as a complete kit or motor only:
http://www.aliexpress.com/store/group/Mid-crank-motor/637802_252958922.html
The only difference I can see is that there is an extra adjustable locking ring which goes on the drive side of the bb shaft which effectively locks the unit into position on the frame.
The disadvantage is that there is a lack of detailed information about this unit unlike the Bafang.
also available here but prices unknown:
http://b-t-n.en.alibaba.com/product/1882712699-218437809/BTN_crankshaft_motor_electric_bike_mid_drive_motor.html
http://www.aliexpress.com/store/group/Mid-crank-motor/637802_252958922.html
The only difference I can see is that there is an extra adjustable locking ring which goes on the drive side of the bb shaft which effectively locks the unit into position on the frame.
The disadvantage is that there is a lack of detailed information about this unit unlike the Bafang.
also available here but prices unknown:
http://b-t-n.en.alibaba.com/product/1882712699-218437809/BTN_crankshaft_motor_electric_bike_mid_drive_motor.html
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