RV tires experience much larger pressure swings than car tires because of their higher operating pressures and greater temperature exposure. Most RV tires run at 65-80 PSI compared to 32-35 PSI for passenger cars, which means the same temperature change creates a bigger absolute pressure difference. A 20-degree temperature drop that barely affects your car tires can drop RV tire pressure by 4-6 PSI.
The bigger issue is that RV tires often sit in direct sunlight while parked, heating up significantly during the day and cooling down at night. This creates a daily pressure cycle that many owners don’t account for. If you check pressure in the morning after a cool night and find it acceptable, those same tires could be overinflated by afternoon when heated by sun and road friction.
Here’s what most people miss: tire load ratings assume proper pressure at operating temperature. An underinflated tire doesn’t just wear faster — it can’t safely carry its rated load. Since many RVs run close to their maximum weight ratings, even a modest pressure drop can put you outside safe operating parameters.
The practical approach is to check pressure when tires are cool, typically first thing in the morning before driving. Keep a quality tire gauge in your RV rather than relying on gas station equipment, which is often inaccurate at higher pressures. Many experienced RVers check pressure weekly during travel season and monthly when parked, adjusting for significant temperature changes.