Why Does Tire Pressure Matter?
Each tire and car manufacturer has different inflation requirements for the tires. When the tire pressure is too low, a lot of friction is created. This results in excessive wear and tear. Low tire pressure also decreases your car's fuel economy.

Tire pressure that is too high is also a serious problem. When the tires are over-inflated, the weight of your vehicle is not evenly distributed across them. This could cause the tread to become bald down the middle.