Three main things to remember when it comes to healthy tires: Evaluate, Inflate and Rotate
Tires Naturally Lose Pressure
Cooler weather increases this by as much as 1 psi with every ten degrees Fahrenheit that the temperature drops.
It takes more than a quick look. One of these tires is ten pound below the recommended level. Always use a reliable pressure gauge, because your eyes are not as accurate.

30 psi

20 psi
Follow the manufacturer’s recommendations. You will find the proper tire pressure on the sticker inside your door and in your owner manual.
The chart shows how under inflation can overload your tires.
Check your tire pressure often to keep it up to where it should be, especially when you carry extra weight.
Low tire pressure will increase heat.
This infrared photography shows tires that were tested at high speed. Damaging heat will increase inflation as the pressure drops.
Monthly Air Pressure Check
To get the most accurate reading, check your tires when they are cold using a reliable gauge. Driving heats your tires making the reading less accurate.

1) Remove tire valve cap.

2) Place the end of the tire gauge over the valve.

3) Press the tire gauge straight and firmly until the scale extends.

4) Add air, if needed, and recheck pressure with the tire gauge.

5) Replace all valve caps.
Tire Rotation
For the best results you should rotate your tires every 5000 miles or so.
Follow the proper rotation pattern.
Visual Tire Wear Check
Look for noticeable signs of wear.

Exposed tread bars (replace)

Irregular shoulder wear (have inspected)

Shoulder wear (have inspected)

Center wear (have inspected)
Put a penny in the tread. If you see the top of Lincoln’s head that means the tread is worn too low and should be replaced.
Evaluate
Regularly check for signs of wear or damage
Inflate
Check tire pressure at least once a month
Rotate
Rotate your tires every 5000 miles