What is the reason for eating tires on the inside of the rear wheel?

Reasons for eating tires on the inner side of the rear wheel: 1, toe-in or steering wheel camber is too small, which belongs to four-wheel positioning inaccuracy; 2. The car did not do dynamic balance after tire repair or tire change. To solve this problem, we need to analyze specific problems. If the four-wheel alignment is not accurate, it is necessary to do four-wheel alignment. If the dynamic balance fails, it should be carried out. Taking dynamic balance as an example, because the tire quality is not completely uniform, the uneven tire quality will be amplified when the vehicle is driving at high speed, which makes the vehicle easy to run off, so it is necessary to add a counterweight to the tire to achieve balance. There are counterweights inside and outside the tire. When vehicles often run on bumpy roads, the counterweight on the outside of the tire falls off, which will cause the inside of the tire to be eaten.