Increase and decrease the height, it is estimated that these two words should be learned in elementary schools. Oh, on motorcycles, many motorcycles have been used for a long time, and the springs for damping will become soft. After people sit up, the rear wheels will leave the fence above. The distance of the profile has become very small, so it needs to be increased now, and the shock absorption is replaced. If the new one is shorter than the old one, it also needs to be increased.electric scooter shock absorbers suspension factory