In general, tires should be inflated to the recommended pressure when they are cold. This means that the tires should not have been driven on for at least three hours, or the vehicle should have been parked overnight. Driving on underinflated tires can cause them to overheat and fail, which can be dangerous.
For passenger cars, the recommended tire pressure is typically between 32 and 35 pounds per square inch (psi). For light trucks and SUVs, the recommended tire pressure is typically between 35 and 40 psi. However, it's always best to check the manufacturer's recommendations for your specific vehicle.
It's also important to note that tire pressure can vary depending on the temperature. As the temperature drops, the air pressure inside the tires will also drop. This is why it's important to check your tire pressure regularly, especially in the winter when the temperatures can be much lower.
As a general rule, you should increase your tire pressure by about 1 psi for every 10 degrees Fahrenheit that the temperature drops below 70 degrees. For example, if the temperature is 30 degrees Fahrenheit, you should increase your tire pressure by about 4 psi.
By following these tips, you can help to keep your tires properly inflated and safe to drive on.
