The pressure is important to the safety of the tyres. When we are on our journey, we need to assure the normal pressure in advance. When the pressure of the car tyre is too low, it will gain the resistance and the oil consumption. The car tyre also can’t support the weight of the car, so it will reduce its handling. The low pressure of the car tyre will lead to the improper wear and shorten the service life of the car tyre.
When the car tyre with a high pressure, we may feel the obvious roughness which can bring us some uncomfortable feeling. The contact area between the car tyre and the road decrease and increase the breaking length.