A common misconception is that the default tire pressure should remain the same regardless of the material that is being loaded. Damp sand can weigh up to 3,400 pounds while two 18 inch rocks can only weigh up to 2,500 pounds, hence according to the application, your tire pressure should also change. To avoid instances where you're using the wrong tire pressure for the application, check the guides and load/ pressure tables provided by your tire manufacturer such as GRI Tires or contact your tire provider for advice on the right tire pressure. Ensuring the tire pressure matches the application will optimise the tire's use and life. A well-inflated tire will also provide a high level of traction. If your application changes quite often, it is advised that you should inflate the tire to hold the heaviest load.