The stones in the car tyres need to be cleaned. The hazards of small stones in the tyre gap are as follows: 1. It will generate noise: Generally, you can distinguish whether there are stones in the tyre and listen carefully when driving. The faster the speed is, the higher the frequency is, which proves that stones have been stuck in the tyre gap. After the tyre gets stuck with stones, there will be a sound of stones rubbing against the ground when the vehicle is driving, which can be obviously felt in the vehicle, and will affect the driver’s judgment of the road condition when it is serious. 2. It will affect the performance of the tire: the grooves on the tire can be used for drainage, and the drainage effect will be weakened when the tire is full of small stones. If you drive on wet and slippery roads in rainy days, the grip or braking performance of the tires will be relatively weak, which is more likely to cause side slip of the car, and it is also easy to cause brake failure when driving on high speed. 3. It may cause air leakage or tire burst: some stones are sharp and may puncture the rubber on the outer layer of the tire when driving at high speed. If the inner tube is punctured again, it will cause air leakage. Although many small stones do not look sharp, and it is difficult to puncture the steel wire belt in the tire carcass, they can puncture the rubber that protects the steel wire, which will expose the steel wire in the air and lead to tire burst after corrosion. In addition, the stones stuck in the gap of the tire may hit the road at high speed, which may cause the local temperature of the tire to rise, and it may also cause a tire burst after a long time. 4. The splashing of crushed stone may hurt pedestrians: when the car is running at high speed, the crushed stone stuck in the tyre groove is likely to be thrown out, which may hurt pedestrians.