Long driving will always cause unstable tire pressure, so what harm does it do? The car tire pressure will lead to the tire deformation, heat generation increase. Greatly reduce the tire life, and will bring about the impact of the drum, the tire delamination, there are safety hazards. But the tire pressure is too sufficient, will cause the tire to contact the ground area to reduce, the control to drop, easy to produce jilt tail, glide and so on danger, and will bring the tread to wear excessively, the tire to burst the tire and so on the safety hidden danger. How do you manage tire pressure?