The letters represent pounds per square inch, a unit of pressure measuring the force of air inside the tire. Visually, they appear flatter and cause the car to pull to one side.
Tire PSI Warning Signs to Watch For
This electronic system uses sensors to warn you when pressure drops below 25% of the recommended level. Consequently, you may need to add air during the winter months to maintain the recommended level.
This is usually found on the driver-side door jamb, inside the fuel filler flap, or in the glove compartment. Locating the Correct Specifications Never rely on the numbers molded into the side of the tire itself, as those indicate the maximum pressure the tire can hold, not the ideal pressure for your car.
Tire PSI Warning Signs to Watch For
Modern Tire Pressure Monitoring Systems Most vehicles manufactured in the last decade come equipped with a Tire Pressure Monitoring System (TPMS). Tires that are too low will wear rapidly on the outer edges of the tread, while over-inflated tires wear down quickly in the center.
More About What does psi stand for on a tire
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