[Knowledge of the owner's family car]Automobile tires include spare tires, which must be checked regularly every month. During the inspection, observe whether there are cracks or scratches on the surface of the tire at the same time. It is best to put on gloves and reach inside the tire to check for suspicious marks. As long as you find the slightest suspicious point, you should immediately ask the car dealer to do a detailed inspection. Don't be reluctant to throw defective tires. If you find that the surface of the tire is abnormally worn, you should think that there may be a problem with the toe adjustment of the wheel, and you need to repair it. 1. Outer edge wear
If you look in the direction of travel, there is greater wear on the outer edge of the tire, indicating that the tire is often under-inflated, that is, the pressure is not enough. If possible, inflate according to the "highway" standard, that is, add 30,000 Pa more than the normal standard. It should be noted that under-inflated tires are very unfavorable for driving in rainy weather, and the grip will be significantly weakened.
1. Convex and corrugated wear
If it is found that the two sides of the tire's landing part are convexly worn, and the periphery of the tire is also corrugated, it means that the shock absorbers, bearings, and spherical couplings of the car are seriously worn. It is recommended that you check the wear of the suspension system and replace the worn parts before replacing the tires. Otherwise, even changing the tires will not help.
2. Even surface wear
Once the tire pattern has been worn out, it indicates that the life of the tire has expired and must be replaced. In addition, the pattern also has the effect of dispelling water from the road area, so it is an important part of maintaining the car's grip. If the wear has reached the standard depth of the tire tread (usually 1.6 mm, 2 mm for tires with a width greater than 175 mm), replace it.
3. Wear of the center part
If you find that the center area of the tire's land area is severely worn, it indicates that the tire is often over-inflated. Be sure to check the accuracy of the pressure gauge and adjust the pressure. It should be noted that the tires need to be over-inflated only when driving at high speeds or when driving with heavy loads.
4. Wear on the inner side of the tire
The inner side of the tire is worn, and the outer edge is burr-like. It is common to see that the suspension system of some old cars is poor, causing the entire body to sink deeply. This indicates that the tire deformation and the symmetry of the two tires have been affected. If possible, it is best to replace all the accessories such as the shock absorber and the spherical coupling. But if the cost is too high, you can consider asking a professional repairman to adjust the angle of the front axle and the tires.
5. Tire side cracks
This situation is mostly due to poor maintenance, or driving on gravel roads and construction sites, so that hard objects contact the tire, causing damage to the inner layer of the tire under heavy pressure. Action should be taken immediately, and tires should be replaced if the repair is not good.
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