
For the front wheels, slightly increased wear of the shoulders of the protectors compared to their middle is normal. Moreover, due to the slope of the road surface, the wear of the shoulders of the protectors facing the middle part of the road may be more pronounced (for the left wheel - from the outside, for the right wheel - from the inside).
Uneven tire wear is most often caused by too little or too much tire pressure. It can also be caused by improper wheel alignment or balancing, or by poor shock absorbers or rims.
First of all, you need to pay attention to whether the tire pressure corresponds to the prescribed value.
Check the pressure only when the tires are cold. The fact is that when driving fast, the tires heat up, and the pressure in them increases. However, it is completely wrong to release air from tires that are heated in this way.
When tire pressure is too high, the middle part of the tread wears more because it flexes more when the tire pressure is high.
If the tire pressure is too low, the shoulders of the treads will press more firmly against the road surface, while the middle part of the tread will bend inward. This results in increased wear of the shoulders of the treads.

Saw-tooth wear of the treads is usually caused by overloading the vehicle.
Incorrect wheel alignment and imbalance also cause the typical tire wear pattern indicated in the fault diagnosis.
[The original text can be read on the website: «www.bmwman.ru»]
