Is It Normal for the Four Tires to Have Different Air Pressures?

[DeJoel]

It is not normal for the four tires to have different air pressures. Uneven tire pressure can lead to poor braking performance, loss of control, difficulty or heaviness in steering, reduced tire lifespan, increased risk of tire blowouts, and higher fuel consumption. These issues become more severe when the vehicle is heavily loaded. According to the international GBT2978-2008 standard, the recommended tire pressures for different types of tires are as follows: Standard tires: 2.4-2.5 bar; Reinforced tires: 2.8-2.9 bar; Maximum pressure: should not exceed 3.5 bar. In winter, tire pressure should be adjusted slightly higher by about 0.2 bar based on the standard tire pressure. Generally, the lower limit of the standard tire pressure is sufficient. For example, the lower limit for standard tires is 2.4 bar. If the car is often parked outdoors, the tire pressure can be slightly lower than the standard by about 0.1 bar to prevent blowouts due to high temperatures.