Mid-drive motor & controller 500W

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