Dynamic balance refers to the phenomenon exhibited during the rotation of the wheel. Due to the asymmetry of the symmetry plane of the wheel, the wheel will swing side to side when the wheel rotates at a high speed. This is the unbalance of the wheel. Before figuring out the dynamic balance of the wheel, the phenomenon and disadvantages of the wheel movement imbalance. If the wheel is unbalanced at high speed, it will cause the wheel to shake and the steering wheel to vibrate during the running of the vehicle. The dynamic unbalance will cause the wheel to sway, causing the tire to wear wave-like wear, and the static imbalance will cause bumps and bounce. The unbalanced state of the wheel causes the car to generate vibration and noise, which affects the ride comfort and makes the driver feel tired and tired, so it is also dangerous when the wheel is unbalanced. Generally, the tire dynamic balance does not have the specified number of mileage, but it depends on the specific use of the tire. When the new tire is replaced, the wheel balance must be made. In the repair shop to do the wheel balance, sometimes the mechanics will be opportunistic in order to save trouble, and the effect of balancing is not ideal, so when the wheel is moving balance, the owner must pay attention to these points:

1. When the old tires are balanced, be sure to pay attention to whether the mechanic completely removes the lead inside or around the rim. Whether the soil in the rim is completely removed, this directly affects the effect of dynamic balance.

2. When replacing a new tire to make a dynamic balance, pay attention to the lubricant on the side of the tire when replacing the new tire. Otherwise, the tire will easily be out of balance with the rim after assembly.

3. There are many factors affecting the dynamic balance. Even if the valve on the tire has a great influence on the dynamic balance of the tire, the material of the valve is reduced from the steel valve to the aluminum valve to the rubber valve. At the same time, the wheel balance is guaranteed.

4. Another point is to pay attention to the balance of the tires, that is, to measure the size of the tire, the more accurate the size measurement, the better the dynamic balance, the deviation of the general size deviation will be 5-15g or more, such small deviation at low speed It is not obvious that it will appear at high speeds.