To find the correct tire pressure for your car, follow these steps:
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Check your owners manual: The recommended tire pressure for your vehicle can usually be found in the owner's manual. This information is specific to your car's make, model, and tire size.
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Look for a sticker on the driver's door jamb: Many vehicles have a sticker on the inside of the driver's door jamb that displays the recommended tire pressure. This sticker may also be located on the inside of the fuel filler flap or in the glove box.
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Avoid using the pressure rating on the tires: The numbers on the sidewall of the tire indicate the maximum pressure the tire can handle, not the recommended pressure for your vehicle.
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Check the pressure when the tires are cold: Tire pressure can vary 1-2 pounds per square inch (psi) for every 10℉ change in temperature. To get an accurate reading, check the tire pressure when the car has been parked for at least a few hours and the tires are cold.
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Consider the front and rear axle pressures: Some vehicles may have different tire pressures for the front and rear axles. Check the owner's manual or the sticker on the driver's door jamb for specific information about your car.
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Don't forget the spare tire: If your vehicle has a spare tire, check its pressure as well. The recommended pressure for the spare tire is often lower than the other tires.