Higher electric power can be achieved through higher RPMs with a smaller size and lighter weight electric motor. An embedded high-efficiency, reliable, maintenance-free Nylon sun-planetary gear system provides greater torque and power in a very small and lightweight hub motor. People rarely recognize this is a hub motor as it is a little bigger than a conventional bicycle hub or brake hub. An automatic clutch keeps the wheel released while freewheeling and engage it only when you need a torque or power from the motor. No noise and no sense of geared motor engaged in whole trip.

Installation simplicity, light and small size, low moment of inertia, high torque and power are achieved accompanied with maintenance free reliability in hub geared motor.