Airing up tires on a cold day...

[Splenda]

I've used Nitrogen for years and don't have to deal with the tempter swings.
Unless you've tried it don't knock it.

Nitrogen is great as long as you don't air down often.

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[RMWV]

Couple of things. First, the high Jeep recomended tire pressures are intended to make the tire slide rather than grip, to reduce roll-overs. Search out the tire manufacturers data sheets for the best tire pressures. I live in WV, so this time of year wild temperature swings are actually normal. Tire pressures may go from 37 to 30 in a 24 hour period. Interrestingly, as the temperature drops, you usually need more traction. Natures air down! When it warms up, the pressures go back up. Jeep needs to include this factor in their pressure warning system, so I don't have that light on when it is really not neccessary.

 

[D_JT]

I've used Nitrogen for years and don't have to deal with the tempter swings.
Unless you've tried it don't knock it.

Tried it. Snake oil. Besides, the air we breath is 78% nitrogen. Which means the air coming out of my air compressor at home is 78% nitrogen.

 

[Zachanadandy]

I've used Nitrogen for years and don't have to deal with the tempter swings.
Unless you've tried it don't knock it.

Fine for a street Jeep but not really convenient when you air down frequently. Sure I could carry a small nitrogen tank and regulator, but I'll stick with the regular air pumped by my compressor that takes up little space and never runs out of air.

 

[BuckeyeButch]

Fine for a street Jeep but not really convenient when you air down frequently. Sure I could carry a small nitrogen tank and regulator, but I'll stick with the regular air pumped by my compressor that takes up little space and never runs out of air.

I drive more than just a jeep.

 

[Splenda]

I drive more than just a jeep.

Some of us only have one vehicle. I refuse to insure more than one vehicle, so my Jeep is my daily driver.

 

[Bandit’s Lair]

During this season, my tires are always down in the morning. Usually by 3-5 psi. 10 minutes rolling down the road and they’re where they need to be. I pay it no mind.

 

[Zachanadandy]

Some of us only have one vehicle. I refuse to insure more than one vehicle, so my Jeep is my daily driver.

We only insure 2, the wife dailies her JLUR on 39s. The JT is used for everything from home depot runs to dump runs to wheeling but sits in the driveway all week as I drive a company car. Nitrogen would be more trouble than is worth for us and the company car tires are small enough that the fluctuations aren't more than a couple psi with temperature.

 

[djthumper]

I have played around with the pressures to see what I like best. They are Toyo Open Country M/T 37x13.5x17 and are E rated, so I think they ride better around 38 psi. What I lose in a slightly rougher ride I make up for in handling. 33 is just a little too squishy for me. I can really tell a difference in turn-in.

My 35s are the same for me. My trip to work has a bunch of curves and much lower than 38 feels too soft.

 

[Splenda]

My 35s are the same for me. My trip to work has a bunch of curves and much lower than 38 feels too soft.

Yep! She handles like she's on rails when they are 38 psi or higher.

 

[Splenda]

We only insure 2, the wife dailies her JLUR on 39s. The JT is used for everything from home depot runs to dump runs to wheeling but sits in the driveway all week as I drive a company car. Nitrogen would be more trouble than is worth for us and the company car tires are small enough that the fluctuations aren't more than a couple psi with temperature.

Nice. I guess I should have said that I hate to insure more than one car per driver. For years I had a truck and a car insured for me, and it always made me mad that there was not a multi-car discount for drivers who had more than one car. I couldn't drive more than one at a time. Obviously, owning a second vehicle reduces the number of miles driven on the primary vehicle, thus reducing the likelihood of an accident. We've been with the same car/homeowner's insurance company since 1991, and we've had two auto claims and one roof replaced during that time. I need to sit down and calculate how much I have given them in 35 years.

 

[Sandman 4x4]

I've used Nitrogen for years and don't have to deal with the tempter swings.
Unless you've tried it don't knock it.

That’s fine until you have to air down to go off roading

 

[Thunderspud]

Eh.....I feel like this Nitrogen vs Normal Ass Air debate gets overblown a bit. If pressure loss over time or fuel economy are the main concerns, there is plenty of evidence showing how marginal those differences are.

Per one of the linked articles.....

We filled one tire per model with air and another with nitrogen. Both were filled to 30 psi (pounds per square inch) at room temperature. We set both tires outdoors for one year, then checked the inflation pressure at room temperature again.

Both tires lost pressure over that time, but the difference in loss was minimal. The average loss of air-filled tires was just 3.5 psi from the initial 30 psi setting. Nitrogen-filled tires lost an average of 2.2 psi.

What about rolling resistance? Nope.

The lab report from NHTSA also found that “inflating with nitrogen in place of air had little or no direct effect on tire rolling resistance performance.”

Sources:

- https://www.consumerreports.org/car...ld-you-use-nitrogen-in-car-tires-a6260003694/


- https://cars.usnews.com/cars-trucks/advice/nitrogen-in-tires?onepage

And here is the actual NHTSA study that all of this information is derived from.

- https://www.branick.com/wp-content/uploads/2019/03/5-NHTSA-2008-Nitrogen-Inflation-Study.pdf

Not saying nitrogen isn't beneficial in some circumstances, just that folks seem to have hard-line opinions on it, and that seems a bit dramatic. I have a nitrogen tank on the Roxor for the tractor, or other things that sit for seasons at a time (mainly because I am lazy and the tank is easier to deploy, lol) but never bothered with them for the Jeeps or anything we drive regularly.

 

[KevinC]

Whether nitrogen filled tires are snake oil or not, I have real world data. My wife's JLU came with nitrogen in the tires. In 3+ years of ownership, I have never had to add air to any of the five tires, ever.
OTOH, my JT has O2 and I have constantly have to add air when the temperature drops. Often.

Is nitrogen snake oil? Maybe. I would never pay to have someone fill my tires with it, only for me to let it out when I do air down. But so far it saved me from dragging out the compressor on one of my Jeeps.

 

[Blade1668]

Tried it. Snake oil. Besides, the air we breath is 78% nitrogen. Which means the air coming out of my air compressor at home is 78% nitrogen.

I was going to say something along that line... I use "Nitrox" 78% /21% O2" being a scuba diver.

Nice. I guess I should have said that I hate to insure more than one car per driver. For years I had a truck and a car insured for me, and it always made me mad that there was not a multi-car discount for drivers who had more than one car. I couldn't drive more than one at a time. Obviously, owning a second vehicle reduces the number of miles driven on the primary vehicle, thus reducing the likelihood of an accident. We've been with the same car/homeowner's insurance company since 1991, and we've had two auto claims and one roof replaced during that time. I need to sit down and calculate how much I have given them in 35 years.

I can understand that, I did get a discount for multi vehicles and do still. When I lived in GA. I had up to 5 Jeeps with insurance. One full coverage and liability for the others. GA. is (was) nasty on vehicles without insurance or lapse / change of insurance companies even. Your lucky to get a notice in mail of suspension of tags then 30 days later your driver's license. Being I lived in a city and drove my trail vehicles not trailering them.

Back O.T.
I usually run a lot higher tire pressure than most here in my JT but heavier loaded and mostly road miles along with towing. My LJ might have 25 psi, I doubt that likely 12 psi.

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