RV Tire Maintenance

Today, RV tires are the topic.

Checking RV Tire Pressure On Motorhomes

Did you know that your RV tires will normally lose one to two pounds of air pressure per month? Did you know that for every 10 degree change in temperature your motorhome tires air pressure changes by one PSI (pounds per square inch)?

Proper air pressure is the most important thing you can do to help your RV tires wear longer, save fuel and improve the handling of your motorhome. Before you hit the road, you need to make sure your motorhome tires are ready to roll. In order to check the motorhome tires you need a pressure gauge, which reads PSI.

Checking your tire’s air pressure is easy with an accurate air gauge. Try to avoid public pressure gauges (the ones that you might normally find at a public gas station) – they can be abused and can become unreliable.

To get the most accurate reading, it’s important to remember to check your RV tires when they’re cold (before you’ve driven on them). This is because gas expands when heated – heat causes the molecules to move faster, (heat energy is converted to kinetic energy) which means that the volume of a gas increases more than the volume of a solid or liquid. However, gases that are contained in a fixed volume cannot expand – and so increases in temperature result in increases in pressure.

Checking the pressure is easy. Remove the valve cap and press the gauge into place. You might hear a short burst of air come out, that’s perfectly normal. The gauge will display the air pressure; remember maximum tire pressure and recommended tire pressure are not the same.

The sidewall of your tire will display a PSI reading, but that is the recommended maximum PSI for that tire – not the recommended PSI for that coach. The recommended tire pressure can be found inside the coach on the door (in most cases).

If you find that you need to add air, remember to check the tire pressure again after you’ve done so. After you’re done remember to replace the valve stem, which will keep the area free of derby and avoid air loss. Remember, on rear dual wheels you need to locate and check the inner tire too.

Under inflated motorhome tires will build up excessive heat. Over inflation can reduce traction, braking, handling and cause uneven tire wear. Remember to check your tires when they are “cold” a cold tire is one that has not been driven on for at least three hours, not cold because it’s chilly outside. It’s important to check the pressure after you’re all loaded and before you hit the road.

Properly inflated tires improve handling, fuel economy and increase the life of RV tires. Air pressure supports the entire RV so proper inflation is important. Air pressure and load limit go hand in hand.

Remember, to get the most out of your motorhome tires and to get the best fuel economy, try to check the air pressure in your RV tires every other time you fill up at the gas station or at least once a month. Your motorhome’s air pressure should be checked every morning on long trips.

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