1, tire pressure is insufficient. Generally, the tire pressure of vehicles driving on normal roads is kept at about 2.5, and it can also be about 2.4 for front wheels and 2.6 for rear wheels. But the tire pressure of the two front wheels or rear wheels must be the same. If the tire pressure at the left and right ends is different, the direction of the vehicle will be biased to the side with insufficient tire pressure. After fast driving, this deviation will be amplified, resulting in vehicle direction deviation. ?
2. The problem of wheel dynamic balance. When the vehicle leaves the factory, the counterweight will be stuck in the four tire hubs to ensure that the four wheels will not be unbalanced when driving. However, when a counterweight falls off and the tire is worn, such dynamic balance will be broken, which will lead to the deviation of the vehicle direction. ?
3. Four-wheel alignment problem. The fourth floor can also be said to be an upgraded version of four-wheel dynamic balance. This balance comes from the field suspension adjustment when the car leaves the factory. When the vehicle is stressed unevenly for a long time or passes through a particularly bumpy road, the suspension is deformed. Because all four wheels are attached to the suspension, if the suspension is deformed, the four wheels will be unbalanced, leading to the direction deviation of the car.