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Tire Pressure

Maximize your tires' performance and durability by monitoring and maintaining correct air pressure. Air is a gas, expanding when heated and contracting when cooled. For most of North America, fall and early winter are especially important times for checking tire pressure—as the ambient temperature falls, tire pressure goes down. A good rule of thumb is that for every 10 degrees Fahrenheit temperature change, tire pressure changes about 1 psi—higher as temperature rise, lower as they fall. Also, check your vehicle's owner's manual for recommended tire pressure.

Sheehan Premier Service - Tire PressureUnder-inflated tires can cause:

  • Premature or irregular wear
  • Poor handling
  • Reduced fuel economy

Over-inflated tires can cause:

  • Unusual wear
  • Poor handling
  • Reduced fuel economy

Checking Air Pressure

Check your vehicle's tires at least once a month, when the tires are cold (let the vehicle sit for at least three hours). Look in your owner's manual for the recommended tire inflation for your vehicle. Use a quality gauge. Don't "eyeball" tires—radial tires can look fine even when they're under-inflated.

Be sure to look for objects that have become wedged in the tread—they can work themselves further into the tire and cause air loss. And don't forget to check the spare!

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