1. Unusual wear on the tread or both sides of a single tire may be due to low tire pressure or faulty tire quality.

2. The tread of the steering axle tires is abnormally worn in "S" shape. It is necessary to check whether the front beam, steering ball head, steel ring is in normal condition and whether the fixing of the steering gear is loose.

3. Rear tire tread is "S" type abnormal wear, need to check whether the rim is normal, wheel screws and axle head is loose.

4. Unusual wear on a part of the tire tread may be due to out-of-round brake hubs, which need to be serviced in a timely manner.

5. Two tires on the same axle with abnormal wear on the inside or outside edges need to be checked for front beam size or steering knuckle main pins.

6. The outer or inner edge of the tire on one side of the steering axle is abnormally worn. The front axle or steering knuckle main pins need to be checked for problems such as deformation.

7. The inner edge of the tire on the rear axle side of the vehicle is abnormally worn, and it is necessary to check whether the wheel bearing clearance is too large and whether the half-axle conduit is bent upward and deformed.

8. On one side of the rear axle of the vehicle, the tire shows abnormal wear on the outside; or on the outside of one side of the bridge, the tire shows abnormal wear on the inside. It is necessary to check if the center screw of the steel plate, the steel plate bushing, and the steel plate lifting lug are loose.