Keep in mind that tires can wear unevenly, which means that each tire's tread depth must be checked in numerous places. Other Signs of Wear The tire, tread and sidewall should all be inspected for any uneven or uneven wear. If there is excessive wear on the edge, shoulder and/or center of the tire, additional maintenance may be necessary. Tire Pressure Once the tread test is complete, you need to check the tire pressure. A manufacturer's recommended pressure for a specific tire (if the tire is original to the car) can usually be found on a sign visible when the driver's door is open: other places where tire pressure recommendations can be found include the glove compartment and in the owner's manual. While you will most likely see a number on the tire itself, this number refers to the maximum amount of pressure a specific tire can handle – this pressure is usually not the recommended amount. How to check tire pressure: To get an accurate reading, a tire's pressure should be checked when it is cold (not after driving). Unscrew and remove the cap on the tire valve stem. Carefully insert the pressure gauge into the valve