What is the appropriate tire pressure for long-distance high-speed driving?

[LaAubree]

For long-distance high-speed driving, the appropriate tire pressure is between 2.3bar and 2.8bar. The pressure should be slightly higher than the usual city driving pressure. When a tire rotates on the ground, it deforms once per revolution. At high speeds, the frequency of deformation increases, generating more heat, which raises both the tire temperature and pressure excessively. Higher tire pressure reduces the amplitude of deformation while keeping the frequency the same, resulting in less temperature and pressure increase during driving, which is beneficial for safety. In summer, due to high temperatures, the tire pressure, which is initially within the normal range, can actually rise above 3.0bar. Therefore, during summer, it is advisable to use a lower tire pressure within the normal range, between 2.3bar and 2.5bar.