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Go Back   Hummer Forums by Elcova > Hummer H3 Discussion Forums > Technical Discussion and Customizing your H3

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  #1  
Old 01-29-2007, 06:56 PM
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Default Nitrogen in tires?

Any have nitrogen put in their tires? It's supposed keep the tire pressure from fluctuating in hot/cold conditions..
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  #2  
Old 01-29-2007, 07:08 PM
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Default Re: Nitrogen in tires?

It is good to do when you have the air in your tires rotated and serviced.

Try Helium
You may get better mileage
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  #3  
Old 01-29-2007, 07:10 PM
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Default Re: Nitrogen in tires?

I have in my Vette because of the low profile tires tend to lose air alot. Not sure why one would do this on a Hummer.
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  #4  
Old 01-29-2007, 07:29 PM
Vettster Vettster is offline
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Default Re: Nitrogen in tires?

I had it put in mine.
It is supposed to give the same pressure hot or cold. Also, not be as prone to leaking.
Haven't had the chance to check it yet though.

So the answer is yes....

and...

No.
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  #5  
Old 01-29-2007, 07:56 PM
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Default Re: Nitrogen in tires?

Quote:
Originally Posted by Desert Dan
It is good to do when you have the air in your tires rotated and serviced.

Try Helium
You may get better mileage

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  #6  
Old 01-29-2007, 08:34 PM
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Default Re: Nitrogen in tires?

Nitrogen is an inert gas and the molecules are larger than oxygen so maybe less leakage...

If you are airing up and down when off roading I wouldn't worry too much about putting Nitrogen in your tires.


Filling automotive and aircraft tires[1] due to its inertness and lack of moisture or oxidative qualities, as opposed to air, though this is not necessary for consumer automobiles.[2]
Nitrogen molecules are less likely to escape from the inside of a tire compared to the traditional air mixture used. Air consists mostly of nitrogen and oxygen. Nitrogen molecules have a larger effective diameter than oxygen molecules and therefore diffuse through porous substances more slowly.[3]

http://en.wikipedia.org/wiki/Nitrogen
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  #7  
Old 01-29-2007, 10:50 PM
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Default Re: Nitrogen in tires?

the idea that nitrogen is less likey to leak is more of a myth. the difference in size of a nitrogen and oxygen molecule is extremely small (literally). nitrogen is more of a gimmick for consumer cars, however, it does contain less moisture and is more stable at temperature ranges than air.
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  #8  
Old 01-29-2007, 11:02 PM
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Default Re: Nitrogen in tires?

Actually, a friend of mine at GM did a study on this very subject. His findings....
Filled with nitrogen, the air pressure did not fluctuate as much, and the leakage when compared to normal air, was a heck of a lot less.
Bad points, the minute you start mixing and dropping the nitrogen level down, you start to lose any benefits.
One of the biggest benefits in nitrogen is no oxidation due to oxygen from the inside of the tire outward, which is why those who store cars, should inflate with nitrogen.
However, for those who wear their tires from the outside toward the inside, nitrogen is really not a benefit, as long as you check your tire pressure each month; more so in large fluctuations of whether temps.

Subject: Info - Use of Nitrogen Gas in Tires #05-03-10-020 - (12/22/2005)



Models: All 2006 and Prior GM Passenger Cars and Light/Medium Duty Trucks (including Saturn)

2003-2006 HUMMER H2

2006 HUMMER H3

2005-2006 Saab 9-7X




--------------------------------------------------------------------------------

GM's Position on the Use of Nitrogen Gas in Tires
General Motors does not oppose the use of purified nitrogen as an inflation gas for tires. We expect the theoretical benefits to be reduced in practical use due to the lack of an existing infrastructure to continuously facilitate inflating tires with nearly pure nitrogen. Even occasional inflation with compressed atmospheric air will negate many of the theoretical benefits. Given those theoretical benefits, practical limitations, and the robust design of GM original equipment TPC tires, the realized benefits to our customer of inflating their tires with purified nitrogen are expected to be minimal.

The Promise of Nitrogen: Under Controlled Conditions
Recently, nitrogen gas (for use in inflating tires) has become available to the general consumer through some retailers. The use of nitrogen gas to inflate tires is a technology used in automobile racing. The following benefits under controlled conditions are attributed to nitrogen gas and its unique properties:

? A reduction in the expected loss of Tire Pressure over time.

? A reduction in the variance of Tire Pressures with temperature changes due to reduction of water vapor concentration.

? A reduction of long term rubber degradation due to a decrease in oxygen concentrations.


Important: These are obtainable performance improvements when relatively pure nitrogen gas is used to inflate tires under controlled conditions.


The Promise of Nitrogen: Real World Use
Nitrogen inflation can provide some benefit by reducing gas migration (pressure loss) at the molecular level through the tire structure. NHTSA (National Highway Traffic Safety Administration) has stated that the inflation pressure loss of tires can be up to 5% a month. Nitrogen molecules are larger than oxygen molecules and, therefore, are less prone to "seeping" through the tire casing. The actual obtainable benefits of nitrogen varies, based on the physical construction and the materials used in the manufacturing of the tire being inflated.

Another potential benefit of nitrogen is the reduced oxidation of tire components. Research has demonstrated that oxygen consumed in the oxidation process of the tire primarily comes from the inflation media. Therefore, it is reasonable to assume that oxidation of tire components can be reduced if the tire is inflated with pure nitrogen. However, only very small amounts of oxygen are required to begin the normal oxidation process. Even slight contamination of the tire inflation gas with compressed atmospheric air during normal inflation pressure maintenance, may negate the benefits of using nitrogen.


GM Tire Quality, Technology and Focus of Importance
Since 1972, General Motors has designed tires under the TPC (Tire Performance Criteria) specification system, which includes specific requirements that ensure robust tire performance under normal usage. General Motors works with tire suppliers to design and manufacture original equipment tires for GM vehicles. The GM TPC addresses required performance with respect to both inflation pressure retention, and endurance properties for original equipment tires. The inflation pressure retention requirements address availability of oxygen and oxidation concerns, while endurance requirements ensure the mechanical structure of the tire has sufficient strength. This combination has provided our customers with tires that maintain their structural integrity throughout their useful treadlife under normal operating conditions.

Regardless of the inflation media for tires (atmospheric air or nitrogen), inflation pressure maintenance of tires is critical for overall tire, and ultimately, vehicle performance. Maintaining the correct inflation pressure allows the tire to perform as intended by the vehicle manufacturer in many areas, including comfort, fuel economy, stopping distance, cornering, traction, treadwear, and noise. Since the load carrying capability of a tire is related to inflation pressure, proper inflation pressure maintenance is necessary for the tire to support the load imposed by the vehicle without excessive structural degradation.

Important: Regardless of the inflation media for tires (atmospheric air or nitrogen) inflation pressure maintenance of tires is critical for overall tire, and ultimately, vehicle performance.
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  #9  
Old 01-30-2007, 03:27 AM
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Default Re: Nitrogen in tires?

FWIW:
Normal air= 78%oxygen.


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  #10  
Old 01-30-2007, 03:35 AM
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Default Re: Nitrogen in tires?

i think as much as we air up and down i will stick with regular air
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  #11  
Old 01-30-2007, 03:59 AM
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Default Re: Nitrogen in tires?

I live down in FL and we have big problems with tire pressure problems, at least my mom. In my car i have Air, but in my moms car they put it in Nitrogen and ill tell you something it defintly does make a big difference and the pressure doesnt fluxuate in the hot/cold it stays pretty level.
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  #12  
Old 01-30-2007, 07:06 AM
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Default Re: Nitrogen in tires?

I started using it a while back but gave up as it was hassle getting the cylinder refilled and added expense about $2 per tyre each inflation. Also was not keen in carrying a 3000psi cylinder around while bouncing about in the dunes. However the tyre pressures were more stable with N2 in the hot climate we have here.
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  #13  
Old 01-30-2007, 01:58 PM
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Default Re: Nitrogen in tires?

Quote:
Originally Posted by Vettster
FWIW:
Normal air= 78%oxygen.


Doh. You mean 78% NITROGEN.

This thread wouldn't be so entertaining if air were 78% oxygen.
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Last edited by ree : 01-30-2007 at 02:04 PM.
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  #14  
Old 01-31-2007, 03:10 PM
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Default Re: Nitrogen in tires?

I bought new tires for my car the other day at COSTCO and they use nitrogen for all the reasons mentioned.
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Old 01-31-2007, 04:33 PM
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Default Re: Nitrogen in tires?

Just joking but:

Let's say you fill up your tires with air (78% nitrogen) and the other 22% leaks out. Then pump more air into your tires - which you will now have about 95% nitrogen and 5% of other. Now the 5% of the other leaks out and you pump up your tires again now you'll have 99% nitrogen.
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  #16  
Old 01-31-2007, 05:34 PM
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Default Re: Nitrogen in tires?

Quote:
Originally Posted by ree
Doh. You mean 78% NITROGEN.

This thread wouldn't be so entertaining if air were 78% oxygen.

OOPS! My bad. you are correct.
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