203mm Bike Brake Disk Center Tool Spacer Washer

Upgrading a Bafang (8Fun) planetary gear hub motor is easy. Just open the housing, remove the motor, mark and drill the holes (4,2mm) , cut M5 threads and Mount the disk ( like https://www.ebay.de/itm/183625465223 )

I build entire experimental eBikes with solar canopy and muscle power support, find out more here: https://www.patreon.com/SunTripToGo