What is the appropriate tire inflation pressure?

[DiElisa]

Here are the methods for checking tire pressure using a tire pressure gauge: Tire pressure gauges are generally divided into three types: analog (pointer-type) tire pressure gauges, digital tire pressure gauges, and alarm-type tire pressure gauges. The latter two can display tire pressure through numerical values or alarms, and their principles are relatively simple. An analog (pointer-type) tire pressure gauge can be connected to the tire valve stem to check the car's tire pressure, and then the tire pressure can be read by observing the pointer on the gauge head. Although the analog tire pressure gauge is also simple, it is prone to misreading if you are not familiar with it, while the other two types can provide tire pressure information more intuitively. Here is the method for checking tire pressure with an analog (pointer-type) tire pressure gauge: Remove the cap from the tire valve stem, connect the tire pressure gauge's air inlet to the tire valve stem, press down until the pointer reaches the highest value, and then release to start reading the tire pressure. After measuring the value, remember to replace the valve cap. The tire pressure gauge has two scales: one is in the imperial unit psi (pounds per square inch), and the other is in the unit kg/cm^2 (kilograms per square centimeter). The value 2.5 refers to the inner black numbers, with a marker indicating the exact position of 2.5. Tire pressure checks must be performed when the tires are cold, as high temperatures will increase the tire pressure. If the pressure is measured when the tires are hot, it is best to subtract approximately 0.2 to obtain the cold tire inflation pressure.