Correct tire pressure is critical for RV safety—underinflation causes heat buildup and blowouts. RV tires are often loaded near their limits. Follow the load tables and check pressure cold.
Tire pressure rises as tires heat up from driving. Specs are based on cold pressure—measured before driving or after sitting for several hours. Always check and adjust when cold.
Tire manufacturers publish load/inflation tables. For a given tire size and load rating, the table shows the minimum cold pressure needed. Your trailer's GAWR and actual weighed load determine the required pressure. Do not exceed the sidewall maximum.
Tow vehicle and trailer tires often require different pressures. Use each tire's load table for its actual load.
Pressure drops about 1 PSI per 10°F drop. In winter, add air to compensate. Recheck seasonally and before long trips.
For the tow vehicle, yes. For the trailer, use the tire load table based on actual trailer weight.
That's the maximum the tire can hold, not the recommended pressure. Use the load table for your actual load.
Before every trip, and at least monthly when stored. Consider a TPMS for real-time monitoring.
If you're diagnosing RV electrical or appliance problems, these guides may help:
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Last updated: March 2026 · Reviewed for technical accuracy