Yesterday I read this question: The electric bicycle motor is on the wheel, and the front drive consumes less energy, so why is the electric bicycle not designed to be front wheel drive? Actually, there are front-wheel drive e-bikes, but more often they are rear drive e-bike conversion kit. The choice of front drive or rear drive depends mainly on the type of e-bike.
In order to adapt to the relatively harsh conditions of use, rear drive e-bike conversion kit is the only choice, mainly the impact of these factors.
1.The bearing capacity of the front shock absorber
Front-wheel drive power can only be transmitted to the body through the two shock absorbers, the transmission force arm is very long, resulting in a large shear force on the shock absorber. Then your shock absorber should be strong enough, and the durability should be good enough. And the rear wheel is directly attached to the frame, and the force is applied by the frame when driving.
Whether it is an electric car or a motorcycle, the center of gravity of the vehicle moves backward when accelerating, and the rear wheel has more adhesion at this time. The rear drive e-bike conversion kit is less likely to slip when the motor power is high, so the drive efficiency is higher. I once rode a front-wheel drive electric car, which is an old-age pedestrian tricycle. When turning on the concrete road, it is obvious that the front wheel has a slight slip, and the driving force is wasted.
3. The front wheel drive direction changes frequently, not as stable as the rear wheel
The front wheel is responsible for turning, if the front wheel drive when you turn the direction of the driving force will also change. The rear drive e-bike conversion kit is always the same as the body, more stable.
4. Rear wheel adhesion is better
Two-wheeled vehicles driving when turning or changing lanes will inevitably tilt the body, and the front wheels deflect a certain angle when turning, so the rear drive e-bike conversion kit has a larger landing area in the turn, and the adhesion to the ground is also greater. For example, in the above picture of this car, electric car driving is easy to encounter this posture, and at this time, the front wheel attachment state is obviously not as good as the rear wheel.
The low energy consumption of front drive is relative to the car
Because most of the car engine and transmission are located in the front of the car, the use of front-wheel drive structure does not require too complex a transmission system, the transmission directly output two drive half-shafts to transmit power to the drive wheels. A rear drive e-bike conversion kit requires a driveshaft to transfer power to the rear axle and then to the two drive wheels through the differential and drive half-shaft. Obviously, the rear drive e-bike conversion kit structure is more complex and the system has more running parts, which will definitely increase the running resistance and thus lead to higher fuel consumption. The electric car; the wheels themselves are electric motors, whether mounted in the front or rear will not increase the resistance of the drive train.
As most of our electric bikes are relatively powerful electric motors, and the frequency of daily use is high and the conditions of use are relatively harsh, so rear drive e-bike conversion kit is definitely the best choice