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  #1  
Old 12-18-2016, 12:09 PM
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Nitrogen filled tires?

Our 2017 GC Summit is the first vehicle we've owned that has nitrogen filled tires.

Lately here in NC it's 27-35 deg one day and 60-80's next day.

Our wheel pressure has been changing with the cold to 28 on on the cold days and back up to 36 on the dot on the warm days.

So what does everyone do when its cold, add normal air to bring it back to 36 or leave it alone.

If you add air to bring it back to 36 and it warms up and the tire pressure goes above 36 do you let the air back out?

We are leaving for Christmas and heading to SD where it's been negative temps so I'm sure we'll have to add some air while traveling.

It never seemed to be this bad when we had plain old air on our tires, is it normal for nitrogen to fluctuate this much? If so I might drain and refill with normal air.

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  #2  
Old 12-18-2016, 01:21 PM
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Re: Nitrogen filled tires?

Check them at each of the 4 seasons per year and set them cold to the door jam preasure and forget about it. There will be some variations but you will go crazy trying to chase it with week to week weather changes.
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Old 12-18-2016, 01:50 PM
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Re: Nitrogen filled tires?

Nitrogen used to be the snitz around here 5-10 years ago.... Some places even used to charge like 40.00 to switch all your tires over to it!! Its key property was no fluctuation, but either you don't really have it or it's something else wrong to fluctuate that much....
I push my tires up to about 40 PSI starting mid to late oct and they fall to appx 35-36 in normal Dec temps of 10-20. A little harder is better than a little softer for many reasons. But Nitrogen has no allure to me any more... Certainly neither a real selling point or worth paying for... JM2Cents worth....
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Old 12-18-2016, 05:50 PM
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Re: Nitrogen filled tires?

the nitro wont effect tire pressure it will be the same as air. here in minnesota before winter i add air to put my tires higher so when it gets cold they wont be too low. id rather have a little extra than not enough pressure. in the olden days before tpms no one ever noticed. for example here it was 25 below zero thus morning and in 2 days will be 60 degrees warmer at 35 degrees. thats 5 or 6 pounds difference in tire pressure. youll never be able to keep it exact.
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Old 12-18-2016, 06:25 PM
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Re: Nitrogen filled tires?

My Jeep dealer used to service tires with nitrogen (the only thing I'd ever go to them for) and after about a year and a half or two they quit doing it.....reason unknown. I had run nitrogen the whole time and actually kind of liked it. Now though, without it being easily accessible, to me it's not worth the effort to track down a place that uses it. I know Costco used to, but don't know if they still do or if they charge you.

If you have pure nitrogen in the tires (hard to do) you won't have any fluctuation in pressures. I used to get about a 3 PSI swing in pressures in the cold of winter and almost none in the summer. Now that I am back on regular air, When the ambient temperatures are below about 40*F, I get a TPMS warning every morning until the tires warm up a bit and the TPMS samples are updated. I'll sometimes get nearly a 10* swing in the pressures from cold to hot, depending on how big the temperature swing is.

I'd say that if they'll service them with nitrogen, let them do it. To get the most in the tires, my dealer used to hook all four up to the nitrogen machine and then let as much air out of the tires as possible (all flat on the ground) and then service them with the nitrogen. If your tire(s) become low at some point, adding air sort of defeats the purpose but, since nitrogen is not readily available everywhere you may have to do it until you can get back to your dealer and have them reserviced.

To me anymore, it's just too inconvenient. If everyone serviced with it, then it'd be great.
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Old 12-18-2016, 08:10 PM
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Re: Nitrogen filled tires?

a few years ago i checked tires in my 2 main cars and set them where i wanted them. as luck would have it the temperature dropped 35 degrees the next day. one of the cars had nitro one didnt. nitro car brand new. car without nitro dropped 3 pounds. car with nitro dropped 3 pounds. no difference. i researched it and found the idea of less temperature swings was part of the sales pitch but not true.
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Old 12-18-2016, 11:59 PM
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Re: Nitrogen filled tires?

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Old 12-19-2016, 11:08 AM
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Re: Nitrogen filled tires?

I wondered this too since my 2017 trailed rated GCO came with nitrogen filled kevlar tires. If it is a scam, then why would the factory spend the money filling them from the factory? Is it to get you to think you need to continue having them serviced at your dealer? I don't know but I guess I'll do some research. It makes it a bit hard to air down for off road driving and then air them back up when you hit the pavement.

It also sounds like formula one race cars only use nitrogen. I wonder why.
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Old 12-19-2016, 12:09 PM
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Re: Nitrogen filled tires?

Like I said, it's almost impossible to COMPLETELY remove the air and replace it with nitrogen. You'd need two service valves per tire and completely purge the air, or pull it out (evacuate) like and air conditioner. Yes, race cars, aircraft and the like all use nitrogen, but the environments they operate in are completely different than the average Joe in his/her automobile. Having worked around aircraft for many years, I was a believer until I actually started using it in my daily drivers.....totally different conditions. Ultimately, IMO, it's just not worth the additional hassle of tracking down a place that has it. Like I said, when everyone services with nitrogen, then I'll switch to it.

You're probably right, the stealer probably wants you to come to them so they can up-sell you on stuff you don't really need and maybe also to reduce the number of folks coming back under warrantee for alleged TPMS problems.
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Old 12-19-2016, 01:15 PM
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Re: Nitrogen filled tires?

Yeah, after reading up a bit more, I see that many experts are saying that nitrogen works very well when done correctly and the average tire/tire shop cannot get all of the oxygen/water out of the tire which negates the benefits whereas F1 teams (and other high end shops/devices) can do a better job. I guess I'll air down and back up with air.
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Old 12-19-2016, 01:41 PM
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Re: Nitrogen filled tires?

By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.

Pure nitrogen works for aircraft tires and for race vehicles. Other than that, it is IMHO, just a gimmick. Just check your tire pressures at least once weekly.
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