Remember,the only part on your car that is actually touching the road is the tires... that's it! All braking, acceleration and steering is transferred to the road through the tires.
Problems Caused By Under Inflated Tires
Minor
Poor fuel economy. It is much harder for a car to roll on a “soft” or low tire than a properly inflated tire.
Poor ride quality.
Moderate
Premature tire wear.
Non repairable damage to side wall.
Non repairable damage due to pothole impact.
Severe
Rim damage due to the tire not properly buffering the shock from a pothole.
Damage to All Wheel Drive systems*.
Poor operation or damage to Four Wheel and All-Wheel Drive systems*.
Sudden tire deflation or “blow out.”
“Detreading” of tire resulting in damage to fender or quarter panel.
“Detreading” of tire resulting in loss of control of the vehicle.
* A low tire spins at a slightly faster speed than it’s properly inflated counterparts. This difference in speed will stress the All-Wheel Drive and Four Wheel Drive systems and may also cause ABS problems as well.