Tire Pressure Check

[Calvin H-C]

I wonder whether the door sticker recommendations reflect the specific tires that the factory installed on your truck. My ‘22 Lariat ER door sticker says my Generals are supposed to be 42lbs, and I would normally use 42 lbs for any brand of tires I subsequently use when these need to be replaced.

Am I wrong?

The door sticker (and FordPass) for my wife's '23 Lariat SR says 42 psi as well, and also has Generals for all-seasons. It was recommended by the shop that the same pressure be used on the Winters when they were purchased.

My '17 FFE says 41, but the '13 ICE Focus we used to have was 36, so there seems to be some factor likely related to the heavier weight of the EV.

Some on here have mentioned inflating to closer to the tire manufacturer's maximum rating, and I'm not so sure that is the best advice. If the inflation is on the high side for the vehicle, the tread will wear more at its centre. Inflate under the optimal value for the vehicle and the tread will wear more at the edges.

How does one determine the optimal value if different tires are put on the vehicle? I suspect tire manufacturers have tables or a formula that can be used that takes into account the vehicle's weight.

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[TheWoo]

That was why I figured the Lightning’s sticker pressure should be used with all brands of tires.

That won't work as different tires handle loads differently. Some will wear evenly at higher or lower pressures.

The chalk test is a good way to find that pressure.

 

[Bwanapete]

What is the chalk test? I want to try it.

 

[TaxmanHog]

What is the chalk test? I want to try it.

 

[Lightning Rod]

I checked my Fordpass app and it says that my tires are 6 lbs low. It is 24 degrees F right now. Should I air them up to 36, even though it's below freezing temperature? I have the factory installed Hancook AT tires on there and I don't want to over or under inflate them. Thanks in advance.

 

[TaxmanHog]

I checked my Fordpass app and it says that my tires are 6 lbs low. It is 24 degrees F right now. Should I air them up to 36, even though it's below freezing temperature? I have the factory installed Hancook AT tires on there and I don't want to over or under inflate them. Thanks in advance.

I see no harm, though when the temp's normalize for your area the cold pressure may go above spec, but not anything to worry about, my AS tires are low right now too, s/b 46 but showing 39

 

[Lightning Rod]

I see no harm, though when the temp's normalize for your area the cold pressure may go above spec, but not anything to worry about, my AS tires are low right now too, s/b 46 but showing 39

I aired them up to 36. She even seems to ride a little smoother. I may even try the Chalk Test above when it warms up here next week.

Thanks, Taxman.

 

[PA Lightning]

Years ago one of my son's friends showed up at our camp to ride his four wheeler with our kids. Tires looked like they were off a monster truck. He had them inflated to the side wall max PSI.
He said it rode a lot better after we removed 40 PSI.

I always go by the manual's recommended PSI

 

[TaxmanHog]

Years ago one of my son's friends showed up at our camp to ride his four wheeler with our kids. Tires looked like they were off a monster truck. He had them inflated to the side wall max PSI.
He said it rode a lot better after we removed 40 PSI.

I always go by the manual's recommended PSI

Totally agree with this, but when you're chasing 50-60 temperature swings it can get a bit tedious raising and lowering them

 

[PA Lightning]

Totally agree with this, but when you're chasing 50-60 temperature swings it can get a bit tedious raising and lowering them

I agree. I am in Pa and had to add /remove air multiple times this year because of temperature swings.

Six gallon pancake compressor is one of the most used tools in the garage during winter

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