Correct tire pressure in cold temperature?

[Maverick2023]

What is the recommended psi for cold temp? It’s been in the 20’s here and the manufacturer recommendation is 35 psi l. Does it hold true in cold condition? Mine is still set at 40 from the dealer or factory.

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[fossil]

The rule of thumb is for every 10° Fahrenheit change in air temperature, tire pressures will change about 2% (up with higher temperatures and down with lower).

 

[rclee]

40 is a little too high. Someone in Mexico doesn't know how to set tire pressure. Mine came in very high and the dealer that prepped it somehow didn't notice it either.


As far as the tires holding the pressure, you will notice a difference when the weather gets cold. I had to put in a couple pounds when the temps dropped. It is just something you will have to keep an eye on. I would recommend the 35 lbs that is on the door jamb sticker.

 

[huunvubu]

What is the recommended psi for cold temp? It’s been in the 20’s here and the manufacturer recommendation is 35 psi l. Does it hold true in cold condition? Mine is still set at 40 from the dealer or factory.

Tire psi should always be set to what the manufacturer recommendation is on the front driver door jamb sticker.

As you state that is 35 PSI and as you noticed the PSI measured will be lower in cold temps.

Tire pressures also over time does go lower so it is best to check it once a month and add or remove some air to keep them at 35 PSI.

For me here in texas with the current low 30's the pressure went down to 30 PSI since last month so I added in air to get back to 35 PSI.

 

[Phileaux]

General rule of thumb 1psi of movement for every 10°(F). 40psi from factory is for steadier transport from factory. Should be corrected during dealer prep.

 

[bgn]

40 is a little too high. Someone in Mexico doesn't know how to set tire pressure. Mine came in very high and the dealer that prepped it somehow didn't notice it either.


As far as the tires holding the pressure, you will notice a difference when the weather gets cold. I had to put in a couple pounds when the temps dropped. It is just something you will have to keep an eye on. I would recommend the 35 lbs that is on the door jamb sticker.

Your dealer didn't do their job. The tires are overfilled for transport purposes.

 

[Flight Test]

Tire pressure drops in colder weather because the air becomes more dense. I religiously check pressure once a month. If I know the air temps will drop, I will add a few PSI's to compensate for the change, knowing what the tire placard states as the recommended value.

 

[AutobahnSHO]

Adjust the tires monthly or with big weather changes to match the PSI on the driver door jamb.

 

[KGiles]

Next time you have service, get your service dept. to swap your air for nitrogen. It will maintain the correct air pressure through temp changes. Tire size will remain the same too. We run nitrogen in race car tires so they don't swell and change the stagger when they heat up. It's a little pricey, but worth it.

 

[olderbudwiser]

Next time you have service, get your service dept. to swap your air for nitrogen. It will maintain the correct air pressure through temp changes. Tire size will remain the same too. We run nitrogen in race car tires so they don't swell and change the stagger when they heat up. It's a little pricey, but worth it.

Since the air we breathe is about 78% nitrogen is there a less expensive way to just replace the other 22% in the tires?

 

[KGiles]

Since the air we breathe is about 78% nitrogen is there a less expensive way to just replace the other 22% in the tires?

Separating it might get pretty steep.

 

[Maverick2023]

Next time you have service, get your service dept. to swap your air for nitrogen. It will maintain the correct air pressure through temp changes. Tire size will remain the same too. We run nitrogen in race car tires so they don't swell and change the stagger when they heat up. It's a little pricey, but worth it.

I get nitrogen for free at costco

 

[Maverick2023]

Your dealer didn't do their job. The tires are overfilled for transport purposes.

That would be Grqnger. I’ll let them know next year

 

[KGiles]

I get nitrogen for free at costco

Hard to beat the price.

 

[GPSMan]

Next time you have service, get your service dept. to swap your air for nitrogen. It will maintain the correct air pressure through temp changes. Tire size will remain the same too. We run nitrogen in race car tires so they don't swell and change the stagger when they heat up. It's a little pricey, but worth it.

This is mis-explained all over the place.

Pure nitrogen is DRY (dried during the production process). The moisture free gas is what expands and contracts less but it is STILL going to change psi with temperature changes. Air from a plain regular compressor will have moisture in it from natural humidity. But higher end compressors, like those used in wood working and paint booths will have air driers, so that compressed air will be remarkable dry. Moisture free air will expand and contract about the same as nitrogen.

A second reason nitrogen is used in race tires AND commercial aircraft tires is: nitrogen does not support combustion. When tires get really hot, they can burst, and added heat from dragging a burst rubber tire can make them catch on fire. Nitrogen gives you at least a 50% chance of not catching the tire on fire. No guarantee, but it is better than nothing.

A third reason race cars and aircraft use nitrogen is it comes in high pressure bottles. It will fill a large tire faster, and it will fill race car tires faster during a pit stop where seconds matter. And again, if you need to bleed pressure off during a six second pit stop, do you want to be bleeding air next to the guy with the gas can or non-combustible nitrogen?

Fourth- high pressure nitrogen cylinders are portable and don't require electricity to operate. Makes them convenient to use. Safe to use.

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