Is a tire pressure of 1.9 bar normal for a sedan?

[StTimothy]

A tire pressure of 1.9 bar is not normal for a sedan. Generally, sedans use standard tires, and according to the international GBT2978-2008 standard, the recommended tire pressure for standard tires is 2.4-2.5 bar. A pressure of 1.9 bar is below the minimum recommended value, so it is not normal. Hazards of low tire pressure: Increased friction coefficient with the road surface, leading to higher fuel consumption; Causes the steering wheel to feel heavy and increases the risk of veering, which are factors detrimental to driving safety; Increases the movement of various parts of the tire, leading to excessive rolling and abnormal heating of the tire; Reduces the functionality of the cords and rubber, potentially causing delamination or cord breakage, and excessive friction with the rim, leading to damage and abnormal wear at the bead area; Multiplies the friction between the tire and the ground, causing a sharp rise in tire temperature, softening the tire, and drastically reducing its strength. High-speed driving under such conditions may lead to a blowout; Increases tire body deformation, making the tire sidewalls prone to cracking and inducing flexing movements, which lead to excessive heat generation, accelerating rubber aging, fatigue of the cord layers, and cord breakage. It also increases the tire's contact area with the ground, accelerating wear at the tire shoulders.