Tire pressure recommendations for everyday driving are optimized for passenger comfort and fuel economy. When you add a trailer, you add load — and correct tire pressure must account for that load. Running the wrong pressure while towing causes overheating, uneven wear, handling instability, and in worst cases, blowouts.
Why towing changes your tire pressure needs
Your vehicle door sticker lists the cold inflation pressure for the vehicle at its rated GVWR (Gross Vehicle Weight Rating) — the maximum weight the vehicle itself is designed to carry.
When you tow, the tongue weight of the trailer (the downward force on the hitch) transfers onto the rear axle. Your rear tires are now carrying more load than the door sticker assumed.
Additionally, towing at highway speeds for extended periods generates more heat in tires than normal driving. Heat causes inflation pressure to rise — which is why cold inflation pressure matters.
How to set tire pressure for towing
Step 1: Find the maximum tire pressure for your specific tires. It is molded into the sidewall as "Max Load" and the corresponding maximum cold inflation pressure. This is the ceiling — not the target.
Step 2: Check your trailer tongue weight. The tongue weight should be 10–15% of your total trailer weight. If your trailer weighs 5,000 lbs, tongue weight should be 500–750 lbs.
Step 3: Consult the tire load-inflation table for your specific tire. Michelin, Bridgestone, and most LT tire manufacturers publish these tables showing the load capacity at each inflation pressure.
Step 4: Set rear tires to the pressure that supports the loaded axle weight — which includes tongue weight. For most light-duty towing (under 6,000 lbs trailer), this means inflating rear tires to the maximum sidewall pressure.
Step 5: Check pressure cold — always before you drive. Tire pressure rises 3–6 PSI after 30+ minutes of highway driving. Do not bleed pressure from hot tires to hit your target.
Common scenarios
1/2-ton truck (F-150, Ram 1500, Silverado 1500) towing a boat or camper: inflate rear tires to max sidewall pressure (typically 65 PSI for P-metric, 80 PSI for LT Load Range E). Front tires stay at door sticker or slightly higher.
SUV (Chevy Tahoe, Ford Expedition, Toyota Sequoia) towing: inflate rear tires to maximum sidewall rating. Check your specific tire load table — not all 20-inch SUV tires have the same load capacity at the same pressure.
Fifth-wheel and goose-neck: towing weight and tongue weight are substantially higher — consult a tire professional or the tire manufacturer's load table directly.
TPMS warning and towing
Most modern vehicles have TPMS set to trigger at 25% below the door sticker pressure. If you inflate to the max sidewall pressure for towing, this may exceed the TPMS threshold and clear the low-pressure light.
The TPMS light itself does not tell you what pressure you are at — only that you are below the threshold. Carry a reliable dial gauge and check pressure yourself at every fuel stop.
Frequently asked
Should I add air to all four tires when towing or just the rear?
Primarily the rear. The rear tires carry most of the increased load from tongue weight. The front tires typically do not need pressure changes for normal towing — unless the trailer is exerting hitch tongue weight near the front axle (unusual). Check front tires too, but they usually stay at door sticker pressure.
Can I tow with P-metric tires?
Light towing, yes. P-metric tires have lower load ratings than LT (Light Truck) tires at the same size. For significant towing (5,000+ lbs trailer), LT tires with a higher load range are recommended. Your vehicle door sticker will specify the minimum load range for towing duty.
Keep reading
Last updated 2026-06-27. General guidance only — confirm specifics with a local shop for your exact vehicle.