Tire pressure gauge is used to measure the vehicle tire pressure instrument, air pressure is too low will make the carcass deformation increase, sidewalls are easy to appear cracks, at the same time to produce flexural movement, resulting in excessive heat, prompting the rubber aging, fatigue of the cord layer, cord breakage, but also to make the tire grounding area increases, accelerating the tire shoulder abrasion. Air pressure is too high, will make the tire cord by excessive stretching deformation, the elasticity of the carcass decreases, so that the car in the driving load increases, such as the impact will produce internal cracking and bursting, while the air pressure is too high will accelerate the tire crown wear, and make the rolling performance decline.

The tire pressure gauge allows the owner to know the current air pressure of the vehicle's tires and compare it with the standard value of the corresponding air pressure unit of the vehicle to decide whether to deflate or replenish the air. How to use the tire pressure gauge is as follows:

1, the tire pressure gauge measuring end groove and tire valve nozzle right pressure, the center line of the gauge mouth and the table body axis of the angle is adjusted to 90 ° -180 °, before reading with a finger gently knocking the instrument shell or the surface of the glass, in order to eliminate the friction in the transmission mechanism.

2, the measurement of the barometer pointer deflection, its indication value is the tire inflation pressure, the higher the air pressure inside the tire, the more the pointer deflection.

3, observation to wait for the pointer and the mirror pointer overlap, at this time the pointer pointed to the value of the correct expression of the value of the barometric pressure, read accurately to a decimal place.

4, After use, press and hold the bleeder valve to return the air pressure gauge pointer to zero.