How much kpa is the appropriate tire pressure?

Generally speaking, the standard tire pressure of a car is in the range of 230-250 kPa. However, the actual normal tire pressure of the car needs to be based on the value proposed by the manufacturer. Generally, the manufacturer's recommended values can be found in the car manual, the logo on the side of the car door (around the B-pillar) in the cab, the chest of drawers next to the driver's seat and the side door of the oil cover. A tire pressure will specify the detailed use of the tire.

Moreover, the tire pressure specification is also related to the tire model and car series. Different car weights, length-width ratios and tire sizes require different tire pressures. The tire pressure of the base tire is 240kpa-250kpa, and that of the reinforced tire is 280kpa-290kpa.

In addition, the tire pressure of cold tire and hot tire is different, and the tire pressure of hot tire is 20kpa higher than that of cold tire. The manufacturer's recommended value is also the tire pressure value of the cold tire. The tire pressure is about 230kpa-250kpa when the car is cold, but the actual tire pressure is subject to the tire pressure marked on each car.

In addition, the tire pressure is also greatly influenced by seasonal factors. The temperature is high in summer, and the tires are very prone to heat when driving. In the case of high tire pressure, it is very easy to cause tire puncture, and the tire pressure is slightly lower. The tire pressure in winter is a little higher than that in summer. Because of thermal contraction and thermal expansion, the tire pressure of a general winter car is between 250 kPa and 280 kPa.