- 1). Insert a tire pressure gauge into the tire's valve stem (the nozzle on the side of the tire) to check the air pressure (PSI) of the tires. Press the gauge down until you don't hear a hiss of air. Note the reading. Check the sticker on the driver's side door to find out what the maximum PSI should be.
- 2). Add or subtract air to your tires if your PSI indicates it. Subtract air by pressing on the metal piece in the valve with a pen. Add air with a simple air pump. Once you add or subtract air from tires, don't forget to double-check the PSI again.
- 3). Examine the tread of the tires. Check for tire wear bars-bars in the tires across the treads. If you see these, the tread has worn down and tire needs replacing. You can also inspect tread by taking a penny and inserting it into the tire groove with Lincoln's head upside-down. If you see all of Lincoln's head, the tire's too worn and needs replacing.
- 4). Look at the tires for damage, cracking, bulges or nails and other objects embedded in the tires. You should also check for uneven wear. Uneven wear can indicate the tires need rotation, are misaligned or are over- or under-inflated.
- 5). Replace any needed tires with the correct sizes. If you buy your Subaru Outback used, make sure the previous owner put the correct size tires on your SUV. Go to GoodyearTires to find the correct size tires.
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