Your correct tire pressure is printed on a sticker inside the driver's door jamb — not on the tire sidewall. For most passenger cars it's 32–36 PSI; for trucks and SUVs it's often 35–44 PSI, and higher for the rear if loaded or towing. That number is the one to follow, not the "MAX" molded on the tire.
Where to find YOUR correct pressure
The door-jamb sticker (or owner's manual) lists the OEM-recommended cold inflation pressure for front and rear — sometimes different on each axle. This is the number your vehicle was engineered for: best fuel economy, even tread wear, and safe handling.
The "MAX PRESS" number on the tire sidewall is the tire's structural limit, not a target. Running at that number typically gives a harsh ride, reduced traction, and abnormal center-tread wear.
Why tire pressure matters so much
Under-inflation is the leading cause of tire damage and blowouts. A tire just 6 PSI low runs hotter, wears the outer edges faster, and reduces fuel economy noticeably. Long-term under-inflation can lead to internal structural damage that isn't visible from the outside.
Over-inflation produces a smaller contact patch, reduces wet grip, and wears the center of the tread faster. It also makes the ride harsher and increases the risk of damage from potholes and road debris.
How to check and set pressure correctly
Check "cold" — before you've driven more than a mile or two. Tires warm up and pressure rises 4–6 PSI from driving, so hot readings aren't accurate for adjustment.
Use a quality gauge (stick, dial, or digital — avoid integrated gas-station gauges which are often inaccurate). Add or release air in small increments and recheck. Don't forget the spare.
Most modern vehicles have a TPMS warning light that triggers around 25% below recommended pressure — but that's already significantly under-inflated. Don't wait for the light; check monthly.
Frequently asked
What PSI should my tires be?
Check the sticker inside your driver's door jamb for the exact number — usually 32–36 PSI for cars, 35–44 PSI for trucks and SUVs. That's the right target, not the MAX number printed on the tire sidewall.
How often should I check tire pressure?
Once a month and before any long trip. Tires naturally lose 1–2 PSI per month, and temperature changes affect pressure significantly — roughly 1 PSI for every 10°F change in air temperature.
Can I use the air at a gas station?
Yes, but bring your own gauge — gas station gauges are often inaccurate. Add or release air in small increments and check after each adjustment.
Last updated 2026-06-27. General guidance only — confirm specifics with a local shop for your exact vehicle.