When it comes to the performance of motorcycles, the shock absorbers in motorcycle vehicle accessories are an unavoidable topic. Before the rear motorcycle shock absorber were invented, driving a motorcycle for a long distance was an unimaginable nightmare. The rigid frame could not withstand the long-term bumps under bad road conditions, and it was likely to break halfway. The comfort of the motorcycle was not commendable. Long distance travel would break the skeleton of the rider. So it seems that shock absorber is a very important motorcycle vehicle accessories. The tire itself is limited in accepting the impact of the road. The shock absorber acts as a supporting link between the tire and the frame. At the same time, a good shock absorber can not only bring riding comfort, but also help the vehicle to have better grip and better handling performance.