engwe c20 pro folding e bike 20 3 0 fat tires bafang 250w brushless motor 36v 15 6ah battery 25km h max speed 60km range dual mechanical disc brake white
engwe c20 pro folding e bike 20 3 0 fat tires bafang 250w brushless motor 36v 15 6ah battery 25km h max speed 60km range dual mechanical disc brake white