Nitrogen for tires?
#1
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I notice that there are tire shops using this which is more stable than oxygen. They use this for airplane tires. Have you tried this and where do you go for this? Costco has it but would not fill my tires since they were not bought through them. Also, where do you go for tire repair and/or replacement for your porsche?
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#3
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Thanks Ben. Any recommendation for places for tire repair and/or replacement. I don't quite trust discount tire to handle this. I'm located in San Diego. I have not needed this yet but wanted to be prepared. I did pick up a plug kit just in case I'm stuck out in the middle of nowhere and I could do a temp. fix over just a can of sealant.
#5
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Originally Posted by humbug
I notice that there are tire shops using this which is more stable than oxygen.
Originally Posted by humbug
They use this for airplane tires.
“PART 25--AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES 25.733 (e) For an airplane with a maximum certificated takeoff weight of more than 75,000 pounds, tires mounted on braked wheels must be inflated with dry nitrogen or other gases shown to be inert so that the gas mixture in the tire does not contain oxygen in excess of 5 percent by volume, unless it can be shown that the tire liner material will not produce a volatile gas when heated or that means are provided to prevent tire temperatures from reaching unsafe levels.”
Originally Posted by humbug
Costco has it but would not fill my tires since they were not bought through them.
#6
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Originally Posted by JasonAndreas
Its a gimmick...
Here's an excerpt from a pretty good article on the subject:
To understand the basis for the sudden interest in nitrogen, a little background is in order.
A dry, inert gas, nitrogen's main benefit is its molecular structure; nitrogen molecules are considerably larger than oxygen molecules, so they don't permeate a tire nearly as quickly. Oxygen can pass through an innerliner, belt package and sidewall/tread three to four times faster than nitrogen.
This factor helps maintain proper inflation pressure longer, which means tires run cooler, thereby increasing safety and reducing operating cost.
http://www.tomorrowstechnician.com/tt/tt020532.htm
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I use nitrogen in my son's kart tires for the (racing) reasons given so far.
Could use dry compressed air, but nitrogen is cheap and readily available at welding supply houses ($15/bottle for N2, ~2000 psi).
(I also use it in my Cup car's tires, since it's available in the trailer and provides for a more consistent pressure build up vs temperature)
Crews will also use nitrogen for their air tools/guns; again, dry to help prevet internal corrosion of their tools.....and it's available in the pits already.
Could use dry compressed air, but nitrogen is cheap and readily available at welding supply houses ($15/bottle for N2, ~2000 psi).
(I also use it in my Cup car's tires, since it's available in the trailer and provides for a more consistent pressure build up vs temperature)
Crews will also use nitrogen for their air tools/guns; again, dry to help prevet internal corrosion of their tools.....and it's available in the pits already.
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#8
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Originally Posted by OCBen
nitrogen molecules are considerably larger than oxygen molecules, so they don't permeate a tire nearly as quickly. Oxygen can pass through an innerliner, belt package and sidewall/tread three to four times faster than nitrogen.
Originally Posted by Steve LaFerre's column
As Sperberg noted, replacing moisture-friendly oxygen with naturally dry nitrogen means oxidation of tire and wheel components is virtually eliminated.
Originally Posted by Steve LaFerre's column
And, without water vapor and oxygen to heat things up, nitrogen-inflated tires supposedly run cooler, last longer and deliver a host of other benefits.
Originally Posted by ltc
nitrogen is cheap and readily available at welding supply houses ($15/bottle for N2, ~2000 psi).
Last edited by JasonAndreas; 04-14-2006 at 05:29 PM.
#9
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While there are those (supposedly knowledgeable folks) who swear nitrogen makes a real difference, with compressed air being 78% nitrogen already, any difference in a consumer car would be negligible at best. Most guys here would be well served to spend their time on other things than trying to find nitrogen to put into their tires.
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Originally Posted by Leader
While there are those (supposedly knowledgeable folks) who swear nitrogen makes a real difference, with compressed air being 78% nitrogen already, any difference in a consumer car would be negligible at best. Most guys here would be well served to spend their time on other things than trying to find nitrogen to put into their tires.
78% N2 air vs 100% N2 aside, since compressed/bottled N2 is dry, there is much less of a chance to cause humidity contamination of a TPMS sensor inside a tire/wheel.
As was mentioned, getting compressed air out of a standard air compressor in a relatively humid environment would introduce a substantial amount of water vapor into a tire's carcass, and under temperature/pressure, the PCB in a TPMS might become susceptible to humidity induced offset/errors (depending on how the circuit is designed and whether or not conformal coating has been applied to the PCB).
#11
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Originally Posted by JasonAndreas
Oxygen does permeate through rubber faster than nitrogen but with the atmosphere at 78% N2 and with tires specifically designed not to be porous membranes its meaningless.
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#12
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Originally Posted by OCBen
Since when are tires made from Vamac (i.e. ethylene acrylic elastomers) ???
#14
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Originally Posted by OCBen
nitrogen molecules are considerably larger than oxygen molecules[/url]
I furhter don't suspect that the conditions inside a tire are such that much O3 is formed.
But either way, the more inert the gas the better in an application such as this. Personally I fill my tires with Krypton. Keeps that ****ole Kent from borrowing the keys.
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