What is the meaning of the tire pressure marking on car tires?
1 Answers
The tire pressure marking on motor vehicle tires indicates the maximum tire pressure limit that the tire should not exceed, for example, usually not exceeding 340 kPa, which is equivalent to 3.4 bar. Generally, the tire pressure marking on motor vehicle tires is located on the sidewall of the tire. Below is an introduction to tire pressure: Normal tire pressure reference standards: According to the regulations and requirements of the international GBT2978-2008 standard, the standard tire pressure is approximately 2.4-2.5 bar, while reinforced tires are around 2.8-2.9 bar. In winter, it is advisable to slightly increase the tire pressure by about 0.2 bar based on the standard tire pressure, whereas in summer, the tire pressure can generally be set slightly lower than the standard by about 0.1 bar to prevent blowouts due to high temperatures. When the vehicle is unloaded or half-loaded, adjust the tire pressure to the lower limit of the standard; when fully loaded, adjust it to the upper limit. On roads with significant bumps, it is appropriate to reduce the tire pressure by 0.1-0.2 bar from the standard. Hazards of over-inflated tires: Over-inflation reduces the tire's friction and grip, prolonging the braking effect. Additionally, the tire becomes harder, decreasing ride comfort and causing more significant body vibrations, indirectly affecting the lifespan of other components such as the suspension. Under-inflated tires are more prone to blowouts: Tires are more likely to blow out when under-inflated. This is because low tire pressure causes significant deformation of the tire sidewall, and during operation, the sidewall is continuously stretched and compressed. Since the sidewall is relatively weak, it is easily damaged.
