cargo electric bicycles purchase what needs attention?

    In general, the optional cargo electric bicycles mainly through motors, batteries, a frame, plate, comparing the results to the wheel. Most home electric three-wheel motor is unilateral, external frame, the structure of the car is no big shaft, not stability, after two rounds of sync, load light, frame deformation. To select a motor city electric bicycle with a large center axis of the shaft which is also called the bridge, back rest, is an important component of the connection between the axles rounds tricycle, tricycle. This car good stability, motor home after two rounds while driving a smooth start. And these cars do not have an external chassis, the vehicle appearance is also nice. These heavy steel frame thicker relatively safe car does not roll. Of course, too much too much power.
    Of course, the most important is the need, where appropriate to their specific circumstances identified, after all, only the right is the best.