Final answer:
To assure RV tires are properly inflated, check the recommended tire pressure for cold tires stated by the manufacturer, usually found in the owner's manual or inside the driver's door. Tire pressure increases with temperature, so measurements should be made when tires are cold.
Step-by-step explanation:
To ensure RV tires are properly inflated, you should understand the relationship between pressure, temperature, and volume of a gas. When air is pumped into a deflated tire, the volume increases with little change in pressure until the tire reaches near its full size; thereafter, additional air causes an increase in tire pressure. Most manufacturers recommend optimal tire pressure for cold tires since the pressure inside tires increases as they heat up during driving. The recommended pressure for a vehicle is typically found in the owner's manual or on a placard inside the driver's door and is different from the maximum pressure indicated on the tire itself. It is important to measure tire pressure when the tires are cold for an accurate reading.