What does the bar on the tire pressure monitoring mean?
2 Answers
The bar on the tire pressure monitoring is the unit of pressure, megapascal, which represents atmospheric pressure, commonly referred to as air pressure, as defined by international standards. Appropriate tire pressure: 1. Standard tire pressure is 2.4 to 2.5 bar; 2. Reinforced tire pressure is 2.8 to 2.9 bar; 3. Tire pressure should not exceed 3.5 bar. Air pressure is the lifeblood of a tire; both too high and too low will shorten the tire's lifespan. Insufficient pressure increases the deformation of the tire body, leading to cracks on the sidewalls and causing flexing motion, which results in excessive heat, accelerating rubber aging, fatigue of the cord fabric, and breakage of the cords. It also increases the tire's contact area with the ground, accelerating wear on the tire shoulders.
I have some experience in tire maintenance. The 'bar' on the tire pressure monitoring system refers to the unit of gas pressure inside the tire. It serves as a standard for measuring how much a tire is inflated. For example, the recommended tire pressure for common passenger cars is typically between 2.2 to 2.5 bar. If you notice the bar value is too low, the tire tends to deflate, which not only increases fuel consumption but also raises the risk of wear. On the other hand, if the pressure is too high, it makes the ride bumpy and uncomfortable, and can even affect braking performance. I remember one time when the bar value dropped to 1.8, the car felt noticeably unstable. After checking at the repair shop, it turned out there was a leak. The tire pressure monitoring system is convenient because it uses bar, which is similar to the international unit kPa (1 bar equals 100 kPa). Some vehicles also use psi, where 1 bar is approximately 14.5 psi. Maintaining the correct bar value can extend tire life by over 10%. I always use a tire pressure gauge for regular checks to avoid safety issues.
