Is a winter tire pressure of 2.8 bar too high?

[CamillaDella]

Winter tire pressure of 2.8 bar is too high. According to the provisions and requirements of the international GBT2978-2008 standard, the standard tire pressure is 2.4-2.5 bar. It is appropriate to increase it by about 0.2 bar in winter, but 2.8 bar exceeds the maximum standard tire pressure of 2.7 bar, so it is too high. Hazards of excessive tire pressure: Tire friction and adhesion will decrease, affecting braking performance; It will cause steering wheel vibration and deviation, reducing driving comfort; Accelerate the local wear of the tread pattern in the center of the tire, reducing tire life; The vibration of the car body will increase, indirectly affecting the life of other components; It will cause excessive extension and deformation of the tire cord, reducing the elasticity of the tire body and increasing the load on the car during driving; Puncture resistance decreases. When encountering sharp objects such as nails and glass on the road, they can easily penetrate the tire, and the impact can cause internal cracks and explosions, leading to a tire blowout.

[AnaAnn]

I've been driving for over 20 years, and this tire pressure is indeed a bit risky in severe cold. The recommended cold tire pressure for regular family cars generally fluctuates between 2.3 and 2.5. 2.8 is equivalent to your car bouncing every time you go over a speed bump, with the middle of the tire bulging significantly, actually reducing the contact area. Especially on icy roads, tires can't grip the ground properly, and the braking distance can increase by half a car length. If you don't believe me, feel your tires after a highway run—the center of the tread will definitely be hotter than the sides, which is evidence of overinflation. Quickly adjust it to 2.5; a tire pressure gauge costing just over ten dollars can solve this safety hazard.

[OwenLynn]

A real warning: Last winter, an SUV with tire pressure at 3.0 lost control while avoiding an obstacle on the highway and crashed into the guardrail. The traffic police report clearly stated that 'excessive tire pressure reduced the tire contact area by 24% and decreased braking friction.' A tire pressure gauge showing 2.8 might seem acceptable, but remember that manufacturers specify cold tire pressure values. As tires heat up during driving, the actual pressure can increase by 0.2-0.3 bar. The risk of skidding on icy roads doubles, especially when you feel the rear of the car drifting during turns. The safety baseline is always to follow the manual.