Under normal circumstances, as long as the tire system (tire or wheel hub) has been replaced or repaired, dynamic balance must be performed, and some individual vehicles will also cause the “dynamic balance weight” to fall off because of the long use time. The tire's counterweight balance is out of balance. In this case, dynamic balancing is required. Dynamic balance is achieved by correcting the balance of the wheel configuration, adding different counterweights to different positions, so that the tires of the car are in concentric motion, making the car more stable and safe to drive at high speed. The dynamic balance needs to be done as long as the tire has been "moved".