For Logansport drivers comparing tire sidewall pressure vs the door sticker, follow the vehicle’s recommended cold pressure for its specified tires. NHTSA directs owners to the vehicle label or owner’s manual, rather than the number molded into the tire.
If replacement tires differ from the original size or type, have the correct setting confirmed by the vehicle manufacturer, tire manufacturer, or a tire professional. A different sidewall number alone does not tell you what pressure your vehicle needs.
Why the sidewall and sticker show different numbers
The door sticker gives a vehicle-specific recommendation. The sidewall’s maximum pressure and load markings describe the tire’s limits. They do not give a recommended setting for your particular vehicle.
Read the wording around the number, not just the number itself. A marking that includes “MAX” or accompanies a maximum-load statement serves a different purpose from the vehicle’s recommended setting.
Do not average the two numbers or choose the higher one as a precaution. For the specified tire fitment, the vehicle recommendation is the target. If the vehicle’s required pressure appears to exceed a tire’s marked limit, have the fitment checked instead of exceeding that limit.
Find the recommended cold tire pressure
Look for the Tire and Loading Information label at the driver’s door opening. Check the owner’s manual if the sticker is missing or unreadable.
Before adding air:
- Record the front and rear specifications separately.
- Match each tire to its axle’s setting; front and rear pressures can differ.
- Check the spare against its own specified pressure.
Keep a photo of the label so you can refer to both axle settings without relying on memory.
When you write the settings down, label them “front” and “rear” instead of making a single note called “tire pressure.” Leave a separate space for the spare. That makes the instructions easier to use when you walk around the vehicle with your gauge.
If you cannot read the label and cannot find the relevant manual entry, ask for help identifying the specification for your vehicle. Bring a photo of whatever remains legible. Do not substitute a general pressure recommendation from another car, even if it looks similar to yours.
Also separate your target from your measurement. In your notes, put the recommended pressure beside each tire’s actual reading. A gauge tells you what is in the tire; it does not tell you what the vehicle requires. Keeping those two pieces of information apart helps prevent a measured reading from becoming your remembered “correct” setting.
Check the pressure when the tires are cold
NHTSA defines cold tires as those on a vehicle that has not been driven for at least three hours. Use a gauge and compare each reading with the appropriate specification.
Driving warms tires and raises their pressure. The U.S. Tire Manufacturers Association advises against releasing air from hot tires to bring them down to a cold-pressure specification. Recheck when cold before making that comparison.
Make pressure checks a monthly habit, including the spare. A tire pressure monitoring system does not replace gauge checks. Logan Tire Service’s guide to updating your auto maintenance routine includes tire pressure in its monthly checklist. The shop also lists tire pressure checks and tire inspections among its services.
For a simple checking record, note the date, whether the tires were cold, and each tire’s reading. Compare the front pair with the front specification and the rear pair with the rear specification. If you adjust a cold tire, take another gauge reading to confirm the result.
If you ask someone else to check the pressure, say whether you have just driven the vehicle. That gives the person doing the check useful context before comparing a reading with the cold specification. Avoid describing a reading as “too high” solely because it was taken after driving and exceeds the number on the door.
You can also put a monthly reminder alongside the pressure record. The purpose is to measure and compare, rather than waiting for a dashboard warning to prompt every check.
What if your replacement tires are different?
Start the discussion with the original label and the complete markings on the installed tires. Tell the professional whether the tire size or type has changed, especially if passenger tires were replaced with light truck tires marked LT.
If you do not know what a previous owner installed, make a note of that uncertainty. Photograph the door label and the tire markings rather than trying to describe the tires as simply “larger” or “heavy duty.” Ask the professional to compare what is installed with what the vehicle specifies.
Keep any pressure recommendation tied to the installed tire information. A useful written note identifies the vehicle, the tires being assessed, and the resulting cold settings. If you later replace those tires with a different size or type, show that note to the person reviewing the next fitment rather than assuming it applies unchanged.
When advice seems to conflict, ask the person giving it to explain which tire fitment the recommendation covers. Show both the vehicle label and the tire marking that caused the confusion. That makes the conversation about the actual vehicle and tires, instead of comparing two numbers without their context.
Useful questions for that discussion include:
- Does this installed tire match the vehicle’s specified fitment?
- Is the door-label pressure appropriate for this replacement?
- If a different setting is needed, what are the confirmed front and rear cold pressures?
- Which manufacturer guidance or load and inflation table supports those settings?
BFGoodrich explains that a changed tire size needs enough pressure to provide the load capability the original tire delivered at the vehicle’s recommended setting. Different sizes can carry different loads at the same pressure, so a professional uses load and inflation tables to determine the appropriate setting.
Ask for the confirmed cold pressures for the front and rear, and keep those instructions with your vehicle records. The assessment must also respect tire and wheel limits. When the tire fitment changes, get a confirmed pressure recommendation before treating either printed number as your target.
