The two rear wheels of the car were serious and the tires began to be chewed. Four-wheel alignment cannot be repaired. What part is wrong?

1. The four tires are not on the same side of the two straight lines required by the standard due to the inaccurate positioning of the four wheels. ...

2. Inappropriate toe-in adjustment can also lead to tire eating, that is, the front wheel leans slightly inward at an angle similar to the inner figure, which is high-speed stability. ...

3. Failure of the steering gear will also cause the tire to bite and run off.

4. Uneven girder and deformation can also lead to tire wear. For example, some accident cars eat tires because the beam is deformed.

If the air pressure of each tire is too different, it will eat the tire. Summary of tire eating reasons of automobile tires: tire gas is the reason why tires are eaten at both ends of tire shoulders.