500W 8FUN Mid-drive conversion kits is a geared motor and a chain wheel that is installed on the bicycle bottom bracket, substituting crank shaft, chain wheel and cranks.
- Crank operating motor kit
- Suitable for down-hill and up-hill sport suspension mountain bikes
- Using bicycle transmission
- Super high torque taking mechanical advantage of the gear shift
- Special frame consideration for installation
- Heavier than hub motor kits
- Some geometrical limitations for down tube battery cases
