What are the common units for car tire pressure?

[StEvan]

Tire pressure is generally measured in five units: kg/cm2, bar, Kpa, Psi, and atmospheric pressure. According to the international standard GBT2978-2008, the recommended tire pressures for different types of tires are as follows: Standard tires: 2.4-2.5bar; Reinforced tires: 2.8-2.9bar; The maximum pressure should not exceed 3.5bar. Normal tire pressure in winter: In winter, the tire pressure should be based on the standard tire pressure of the car, with an appropriate increase of about 0.2bar. Normal tire pressure in summer: Generally, the lower limit of the standard tire pressure is sufficient. For example, the lower limit for standard tires is 2.4bar. If the car is often parked outdoors, the tire pressure can be about 0.1bar lower than the standard to prevent tire blowouts due to high temperatures.