The correct tire inflation pressure comes from the vehicle's tire information label and owner's manual. The maximum pressure molded on a tire sidewall is not the everyday target for that vehicle. There is no single PSI setting that works for every passenger car, SUV and light truck.
Short answer: use the vehicle’s cold pressure specification
NHTSA's tire guidance recommends checking pressure with a gauge at least monthly, including the spare. Measure when the tires are cold: the vehicle should have been parked for at least three hours. Use the setting specified for the axle and operating condition described by the vehicle manufacturer.
Read the label before adding air
Find the tire information label, commonly in the driver's door area. Compare it with the owner's manual if you have questions. Front and rear settings can differ, so record them separately instead of assuming every tire takes the same pressure.
If the vehicle has modified wheels or a different approved tire configuration, have a qualified professional establish the correct specification. Do not copy another driver's pressure or infer a target from a tire's brand, size or maximum marking alone.
Check the units on the gauge and label. PSI, kPa and bar are different units; a number without its unit is not enough to make an adjustment. If a reading seems implausible, stop and verify the gauge and units before proceeding.
Why a warm reading needs context
Michelin’s inflation guidance explains why pressure rises as tires warm. The vehicle's cold setting is intended to be checked under cold conditions. Do not release air from a warm tire simply to make its reading equal that cold target.
If a tire appears low or a warning occurs during a trip, follow the vehicle's instructions and obtain assistance when necessary. Recheck under proper cold conditions. A planned later pressure check is not a reason to drive on a visibly flat or damaged tire.
A dashboard light is not a full inspection
A tire pressure monitoring system, or TPMS, provides a warning when pressure is significantly low. It does not replace routine gauge checks, and an unlit warning does not establish that every tire is at its correct setting.
Consult the owner's manual to interpret a flashing light, a displayed reading or a system fault. Do not assume every warning has the same meaning across vehicles. Keep the gauge check and the visual condition check as separate parts of tire care.
What to do about an unexpectedly high reading
Confirm the units, the axle's specified pressure and whether the tire is cold. A reading such as 90 PSI cannot be judged from that number alone without knowing the tire and vehicle application; it must never be treated as a general passenger-car target.
If the reading substantially exceeds the applicable tire or vehicle specification, or the tire shows damage or distortion, stop using the vehicle and get professional assistance. Do not stand close to a visibly distressed tire or attempt a repair. Ask the shop to assess the condition before further driving.
For ordinary pressure adjustment on an undamaged tire, follow the vehicle and gauge instructions. If you are unsure whether the situation is ordinary, let a tire professional handle it. Returning a number to the recommended setting does not, by itself, prove that a previously damaged tire is safe.
Keep track of repeated changes
Record each tire's cold reading and the date. A tire repeatedly losing pressure needs inspection for the cause; repeatedly topping it up does not resolve a leak. Tell the shop about recent impacts, service work and any change in vibration or handling.
If replacement is required, use the approved tire size and required load and speed ratings. Inflation cannot make an incompatible tire suitable for the vehicle.
FAQ
Should I use the maximum pressure on the sidewall?
Use the vehicle's cold pressure guidance for the fitted, approved configuration. The sidewall maximum is not a substitute for that specification.
Does every SUV need more pressure than every car?
Vehicle category alone does not provide a setting. Read the exact vehicle's guidance and check each axle.
Can I rely on the dashboard to check pressure?
Keep regular cold gauge checks even when there is no warning. Use the owner's manual to understand the monitoring system's operation.
Bottom line
FixGo offers competitive tire pricing and installation through 200+ partner shops in greater Los Angeles and 20+ in San Diego. Tire delivery is usually 1–3 days in greater Los Angeles and 3–5 business days in San Diego. Confirm the installation appointment and use the website locator for designated pickup points and dedicated warehouses. Browse the correct specification at FixGo.com.
