According to the Chinese standard GB/T 2978-2008, the standard tire pressure range is between 2.4 to 2.5 bar, and for reinforced tires, it's between 2.8 to 2.9 bar. The pressure should not exceed 3.5 bar. Thus, a tire pressure of 2.0 indicates that the tire is under-inflated.
Apart from the national standard, auto manufacturers also indicate the recommended tire pressure for specific models in the vehicle's manual and on labels on the vehicle. Typically, these labels can be found on the pillars of the driver or passenger doors, inside the fuel cap cover, and other such areas.
Note: When tire pressure is low, the friction coefficient between the tire and the road surface increases, leading to higher fuel consumption. If the pressure is too low, it causes the tire to deform more, weakening the cords and rubber, leading to potential issues such as layer separation or cord breakage. Cracks can easily appear on the tire's sidewall. The tire undergoes excessive flexing, resulting in overheating, which accelerates rubber aging and increases wear on the tire's shoulder.
