Is 300kpa Tire Pressure Normal for a New Car?
2 Answers
Tire pressure of 300kpa is considered relatively high. The standard tire pressure ranges from 240-250kpa, while reinforced tires have a recommended pressure of 280-290kpa. Additionally, cold and hot tire pressures differ, with hot tires being about 20kpa higher than cold tires. The manufacturer's recommended value is based on cold tire pressure, typically around 230-250kpa, but the specific pressure should always follow the marking on each vehicle. Hazards of low tire pressure: Increases friction coefficient with the road surface, leading to higher fuel consumption. Causes heavy steering and potential alignment issues, compromising driving safety. Increases movement in various parts of the tire, resulting in abnormal heat generation due to excessive rolling. Reduces the functionality of cords and rubber, potentially causing delamination or cord breakage, and excessive friction with the rim leading to damage and abnormal wear in the bead area.
I have some experience in driving and always feel that a new car's tire pressure of 300 kPa is a bit high. Normally, the tire pressure when a new car leaves the factory might be around 250-280 kPa for testing purposes, but the recommended value for daily use is generally between 200-250 kPa, depending on the vehicle manual or the label on the door edge. Excessive tire pressure can accelerate wear in the center of the tire, leading to longer braking distances or insufficient grip at high speeds, which affects driving safety. I suggest checking the actual value when the car is cold in the morning and releasing some air to reduce it to around 240 kPa. This can also reduce tire noise, improve ride comfort, and extend tire life, saving on maintenance costs. Regularly checking tire pressure is a basic habit, with adjustments made at least twice a year to account for seasonal changes.
