What does the bar on the car mean?

[Courtney]

The bar on the car refers to the unit of tire pressure. Tire pressure is crucial for tires, as it should neither be too low nor too high. If the pressure is too low, the tire may exhibit wave-like deformation during high-speed driving, increasing the risk of a blowout and reducing the tire's lifespan. If the pressure is too high, it reduces the contact area between the tire and the ground, negatively affecting the car's handling and driving stability. Tires are made of rubber, which ages over time, so they need to be replaced periodically. After installing new tires, it is essential to perform a dynamic balance test on each wheel to prevent abnormal vibrations during high-speed driving. Abnormal wheel vibrations at high speeds can impair the car's handling, ride comfort, and overall safety.