What is the normal tire pressure?
2 Answers
According to the provisions and requirements of the international GBT2978-2008 standard, the tire pressures for different tires are as follows: Standard tires: 2.4-2.5bar; Reinforced tires: 2.8-2.9bar; Maximum pressure: Should not exceed 3.5bar. Normal tire pressure range in winter: In winter, the tire pressure should be based on the standard tire pressure of the car tires, with an appropriate increase of about 0.2bar. Normal tire pressure range in summer: Generally, the lower limit of the standard tire pressure for car tires is sufficient. For example, the lower limit for standard tires is 2.4bar. If the car is often parked outdoors, the tire pressure can generally be about 0.1bar lower than the standard to avoid tire blowouts due to high temperatures. Hazards of excessive tire pressure: The friction and adhesion of the tires will decrease, affecting braking performance; It can cause steering wheel vibration and deviation, reducing driving comfort; It accelerates the local wear of the tread pattern in the central part of the tire, reducing the tire's lifespan; The vibration of the car body increases, indirectly affecting the lifespan of other components; It causes excessive stretching and deformation of the tire cords, 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 or glass on the road, they can easily penetrate the tire, and the impact can cause internal cracks and explosions, leading to tire blowouts.
I usually drive a family sedan, which I've been using for several years. The normal tire pressure is generally around 30 to 35 PSI, depending on the specific model. You can find the recommended values in the owner's manual or on the label inside the door frame. If the tire pressure is too low, the car feels sluggish, the steering wheel becomes heavy, and fuel consumption increases significantly. If it's too high, the ride becomes bumpy, affecting comfort. I make it a habit to check the tire pressure once a month in the early morning when the car is cold, as this gives the most accurate reading. I use a simple tire pressure gauge for this. In winter, you need to add a bit more air because cold air causes the tire pressure to drop due to contraction. In summer, be careful not to overinflate due to heat expansion. Safety comes first—maintaining proper tire pressure helps avoid blowouts and loss of control. Remember to check regularly and don't wait until there's a problem to regret it.
