Your tires will wear evenly which prolongs the life of your car and improves your vehicle fuel economy. When correctly inflated your tires can perform better with more dependable traction and a more comfortable ride.
The Negatives of having Low and High Tire Pressure
Low tire pressure can lead to complete failure of your tires. Too much contact with the surface of the road increases friction, and this heat can cause tread separation and a possible blown tire.
High tire pressure can lead you to lose traction. When overinflated your tires round out on the tread section causing the center to wear significantly faster than the outer edges.