36V 450W stronger power middle drive electric bike motor kit Variable speed Ebike electric bicycle conversion kit for DC Motor

36V 450W stronger power middle drive electric bike motor kit Variable speed Ebike electric bicycle conversion kit for DC Motor    I. Middle DC Motor Kit Features 1. The combination of the mid-mounted motor and the mountain bike transmission system results in the perfect cooperation of speed and torque, high torque output, off-road and climbing weapon. The speed of the motor of this product is stepless, adjustable from 0 to the maximum speed in freely; 3 speed tooth plate with flywheel speed change is a multi-speed mechanical transmission, up to 21 speed, 24 speed, 27 speed, 30 speed, the two point combination, under different road conditions can always adjust the appropriate power output and speed matching.Which is the best ideal match of flat Road, hillside, long distance, and off-road.It Compared to the wheel-hub motors, they are more bigger powerful and faster. Compared with ordinary single-speed (single-cranked) mid-mounted motor,more bigger power, more gear shift, and the origin