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IMPORTANCE OF CORRECT PRESSURE
By not paying attention to the proper air pressure in tires, one could be setting themselves up for disaster. Serious injury has resulted many times as a direct result of not having the proper inflation in tires.
Maintaining the proper inflation in tires will maximize the performance in the tires and can save you big bucks in the long run over fuel. The act of driving as well as riding in a car with properly inflated tires is much more comfortable and safer. Tires are built a certain way and proper air inflation keeps the proper parts of the tire connected to the road as they were designed to be. By doing so, you'll also eliminate heat buildup on the rubber. Tire structure will be more stable which gives the car much better response and handling.
DANGERS OF UNDERINFLATION
A tire only has to be low by as little as six psi for damage to start setting in. The internal parts of the tire will become weaker. By riding low, more of the tire sidewall will be in contact with the pavement when it was never designed to be. Tread wears faster on the sides leaving the middle part still fresh. This contributes to the deterioration of the tire. Internal heat will build up, which decreases the roll performance of the tire. This reduction causes more gas to be used by the car. Steering and cornering becomes more difficult and awkward.
DANGERS OF OVERINFLATION
Again a tire only has to be over by as little as six psi to lose its optimal performance. By being over-inflated a tire has less of its surface in contact with the road which leads to less traction. The possibility of damage from hitting obstacles in the driving path is greater due to it's stiffness from over-inflation. Uneven tread wear will show on the surface of the tire, the middle will be worn while the tread is still fresh on the outsides. The over-inflated tire rides much more roughly than one that's inflated just right. Riders in a car with tires that are inflated too high find that the noise level is much higher than usual.
PROPER CHECKING OF TIRE PRESSURE
The proper psi for a particular tire is labeled on the tire's sidewalls, however this has been found to be different from the recommended pressure put out by the vehicle manufacturers. The car makers have tested their cars and know the proper pressure that a car of that type and size can handle. Therefore, it's recommended that one sets their tire pressure by the recommended amount proposed by the vehicle makers. This information can be found in the specs label inside the door or in the vehicle manual.
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