What is the appropriate tire pressure for highway vehicles?

[MacJuliette]

Generally, the normal tire pressure for sedans is around 2.2-2.5. Below is an introduction related to tire pressure: 1. The relationship between tire pressure and load capacity: Tire pressure is an indicator of a vehicle's load capacity. The load capacity of a vehicle depends on the level of tire pressure. According to the relationship between the tire's load index, tire pressure, and load capacity, the higher the tire pressure, the greater the load capacity; the lower the pressure, the smaller the load capacity. 2. The relationship between tire pressure and vehicle dynamics: When a vehicle is driving at a constant speed on a flat road, it must overcome rolling resistance from the ground and air resistance. Tire pressure has a significant impact on the rolling resistance coefficient. When the pressure decreases, the rolling resistance coefficient increases rapidly. This is because lower tire pressure causes greater deformation of the rolling tire, increasing hysteresis loss. Therefore, appropriate tire pressure ensures good vehicle dynamics.