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OT Nitrogen in Tires

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Loren in Florid

07-14-2007 18:16:44

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Does nitrogen in tires require a different type pressure gauge? Using 2 different old tire gauges, which both read the same, I am about 12-15 psi lower than what dealer states the pressure is set at. Also, what is the advantage to nitrogen in the tires?

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paul

07-15-2007 21:53:20

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Re: OT Nitrogen in Tires in reply to Loren in Florida, 07-14-2007 18:16:44

If you are in an airplane or a Nascar you will like the stability the N provides - just regular air will fluctuate a bit more, and not as predicably, with temp and all. But remember Nascar folks measure to the nearest 1/4# of pressure....

For regular vehicles, it's a selling gimick.

--->Paul

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caterpillar guy

07-15-2007 13:06:11

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Re: OT Nitrogen in Tires in reply to Loren in Florida, 07-14-2007 18:16:44

Who says the tank the dealer is using actually has nitrogen in, in the first place. Now for the water being more compressible than oxygen or nitrogen not so it does not compress or it wouldn"t bend rods when in an engine cylinder. I don"t put oxygen per say in my tires anyway just compressed air oxygen is to pricey.

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John M

07-15-2007 05:08:33

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Re: OT Nitrogen in Tires in reply to Loren in Florida, 07-14-2007 18:16:44

What I CAN tell you about nitrogen is that 8 months ago I bought a new set of tires for my dually, thought I let the dude con me into nitrogen until I went for my first "refill", (which BTW they do for free every 3 months),the rears hadnt lost any pressure, and the fronts had only lost 1 pound on one side, two on the other.Which I guesss normally would or could be normal.Went yesterday since I was in the neighborhood, 5 months after, and same results pretty much,They arent "losing" air like what I would consider normal.I use to lose 6 or 7 pds between checks, but for now it seems to be accually working like the guy says, and to me, FOR THE TIME BEING, that side of it seems to be working.Another thing I noticed, when I first got the tires, I couldnt get the fronts just yet, so I just got the rears.They also told me it would run cooler, well when I got home after buying the rears, indeed the rears were cooler, but most of my weight is in the front so I hooked up the trailer, loaded up my Farmall M and pulled it aorund an hour or so, and again, the rears were cooler than the fronts.When I had the fronts put on, the filled with nitrogen for free.Again when I got home, there was a noticeable feel in how warm the tires were,still warmer than the rears, but not as warm as the old tires which were still in OK shape. Now, am I sold on this, NO, but so far it has done exactly what I was promised it would do.

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MarkB_MI

07-15-2007 04:32:50

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Re: OT Nitrogen in Tires in reply to Loren in Florida, 07-14-2007 18:16:44

Pressure is pressure. However, "dry" nitrogen has a more consistent pressure over a range of temperature than air. That's because it has almost no water in it. The densities of oxygen and nitrogen are about the same, but water is much less dense and more compressible than either O₂ or N₂.

If you think your gauges are right, and the dealer is too cheap to add any more nitrogen to your tires, just give 'em a shot of air. The amount of water you're going to add is insignificant.

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135 Fan

07-14-2007 22:33:05

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Re: OT Nitrogen in Tires in reply to Loren in Florida, 07-14-2007 18:16:44

Nitrogen has bigger molecules than compressed air so it won't leak as easily and because it is drier it lets tires run cooler which apparently makes them last longer. Some places put in nitrogen for no cost when you buy new tires there. It is also better if you run lower pressures like when going off road. Dave

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James22

07-15-2007 07:35:36

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Re: OT Nitrogen in Tires in reply to 135 Fan, 07-14-2007 22:33:05

You need to get the old chemistry books out. Air is already over 78% nitrogen with 21% oxygen and 1% trace elements. A nitrogen atom has an atomic weight of 14 and oxygen 16. Nitrogen molecule has two nitrogen atoms which gives nitrogen gas an atomic weight of 28. Dry air with all of its components has an average atomic weight of 28.97. Depending on moisture content this number for air will be slightly lower. No doubt some air pressure loss can be contributed to the loss of the "light" trace element gases hydrogen and helium but this would occur over a long interval. The big advantage to nitrogen is it will not oxidize the rubber, consequently "destruction" of the tires is only ocurring on the outside, not happening on the inside.

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buickanddeere

07-15-2007 04:23:44

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Re: OT Nitrogen in Tires in reply to 135 Fan, 07-14-2007 22:33:05

I'm glad the liquid ballast in my tractor's tires doesn't boil.

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jeffcat

07-14-2007 21:16:36

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Re: OT Nitrogen in Tires in reply to Loren in Florida, 07-14-2007 18:16:44

The guys who do refrigeration carry Nitrogen to clean out lines and such. They use it in their truck tires cause it is handy.

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buickanddeere

07-14-2007 18:38:23

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Re: OT Nitrogen in Tires in reply to Loren in Florida, 07-14-2007 18:16:44

Unless you are regularly landing at 140knots with a full bomb bay and with full missile racks. Don't waste your $$$ on N2. Ordinary "air" is about 79% N anyways.

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ErnieDD

07-14-2007 18:22:06

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Re: OT Nitrogen in Tires in reply to Loren in Florida, 07-14-2007 18:16:44

I would say the dealer's gauge is off, if you have two that read the same and the tires are at the same temperature.

The main benefit of nitrogen is it inflates the dealers bottom line. The Nitrogen molecule is a little larger than oxygen, so theoretically the gas diffuses a little slower out of the tire. So check 'em once a month and keep the $20.

remember you have a 80% nitrogen fill to begin with

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BarryfromIA

07-14-2007 19:03:04

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Re: OT Nitrogen in Tires in reply to ErnieDD, 07-14-2007 18:22:06

Some weekend dirt track racers use it because a tank in the trailer is handier than a compressor. Also a rumor that it is more stable

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Davis In SC

07-14-2007 21:10:10

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Re: OT Nitrogen in Tires in reply to BarryfromIA, 07-14-2007 19:03:04

A nitrogen tank is handy to have.. I get one from the shop sometimes to run an impact where I do not have access to a compressor..

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Gerald J.

07-14-2007 19:56:58

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Re: OT Nitrogen in Tires in reply to BarryfromIA, 07-14-2007 19:03:04

Since that tanked nitrogen is dry having no water, there's no water to boil a make steam to vary the pressure. So for racing where tire pressures are critical to survival its a pretty good idea. Otherwise its an expense that you can't prove you paid (unlike a chrome dodad) for.

Gerald J.

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