How much does tire pressure increase when driving on the highway?

[OThomas]

Tire pressure increases by 0.4 to 0.6 bar when driving on the highway. The normal range for tire pressure is 2.2 to 2.4 bar. Tire pressure rises with increasing temperature. During high-speed driving, especially during emergency braking and rapid acceleration, tire temperature increases quickly. For every 10-degree rise in tire pressure temperature, the pressure increases by 0.1 bar. Therefore, maintaining tire pressure at the standard value helps avoid blowouts during high-speed driving and emergency braking. During long-distance driving, prolonged friction generates heat in the tires, causing tire pressure to rise in high-temperature conditions. However, do not lower tire pressure excessively to prevent blowouts, as insufficient tire pressure increases the contact area between the tire and the ground, generating more heat through internal friction, which consumes internal gas and damages the tire structure.