Proper tire pressure is necessary for optimum tire performance, safety and best fuel economy.
Always maintain tire pressure at the level recommended by the vehicle manufacturer as shown on the vehicle placard or in the Owner's Manual. Higher inflation pressure increases stiffness which may deteriorate ride and generate unwanted vibration.
Under inflation of tires is the most common cause of failures in any kind of tire and may result in severe cracking, component separation or "blowout," with unexpected loss of vehicle control and accident. Under inflation increases sidewall flexing and rolling resistance resulting in heat and mechanical damage.
A tire also acts as a spring between the rim and the road. This spring characteristic is very important to the vehicle's ride.
Too high an inflation pressure causes the tire to transmit shock loads to the suspension and reduces a tire's ability to withstand road impacts.
Too low an inflation pressure reduces a tire's ability to support the vehicle's load and transmit cornering, braking and acceleration forces.
Rotate your tires, front to rear, at the most every 6000 miles. Please check your manufacturers hand book. This is especially important on front wheel drive vehicles.
The tires on the front usually wear faster than the rears, and if you don't equalize that wear by tire rotation you will be wearing out the 2 front tires prematurely.