Mocoondo
Chicago, IL
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rongtamw wrote:I'm hearing good things about using nitrogen in tires .Has anyone tried this and what was the outcome.
While you are getting your tires serviced with nitrogen, could I possibly interest you in this great piece of waterfront property I have out in Death Valley.
When you get your tires serviced with Nitrogen, what you are really paying for is green valve stem caps which signifies to every con artist on the highway that you meet that you are a good mark.
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Old-Biscuit
Across the USA
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By now I think you have gotten the forum consensus concerning the use of nitrogen in RV tires.........
If interested in more just type in 'Nitrogen' in search box....lots & lots & lots of threads about it.
Consensus is same......
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Jagtech
Lethbridge, Alberta, Canada
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OK, this raises the question about tire pressure vs altitude. Does nitrogen offset the change in tire pressure when travelling from sea level to, say 3500 ft altitude?
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Dennis M M
Geneva, IL; Tucson, AZ
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A pretty definitive analysis of the usefulness of nitrogen can be found here.
Bottom line - save your money, it's no better than air.
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4*phun*2
Canada
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johnrbd wrote:Wonder if anyone has tried helium in their tires. Is it doable and economically feasible? If it was, mpg could be improved.
MythBusters tried it in a football but it didn't seem to improve the distance they could throw it.
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skipnchar
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It's amazing what you can hear that isn't true. 
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Dakzuki
Carnation, Wa, USA
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The reason nitrogen is used in aircraft tires is because it will not provide oxygen in the event of a fire.
Helium has been tried as an experiment in aircraft tires and not adopted.
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vic46
Red Deer, Alberta, Canada
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So if one converts to nitrogen one then doesn't have to do the summer and winter air changes in the tires.
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Mocoondo
Chicago, IL
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Jagtech wrote:OK, this raises the question about tire pressure vs altitude. Does nitrogen offset the change in tire pressure when travelling from sea level to, say 3500 ft altitude?
No it does not. Let me preface my explanation by stating that outside of the RV world, I am an airline pilot.
Nitrogen is installed in aircraft tires for one reason only: combustibility. The last thing we want is to have a conflagration underneath the wing of an aircraft because that is where the fuel is stored. Any technique we can use to minimize the flammability of any component of the aircraft is something that is pursued.
That said, to answer your question relative to change in pressure as temperature changes, indeed it does. You would need to apply Gay-Lussac's Law which is P1/T1 = P2/T2. Convert all your temperatures into degrees Rankine (add 460° to your temperatures) first and then plug in your numbers and solve for P2.
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Jagtech
Lethbridge, Alberta, Canada
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Mocoondo wrote:Jagtech wrote:OK, this raises the question about tire pressure vs altitude. Does nitrogen offset the change in tire pressure when travelling from sea level to, say 3500 ft altitude?
No it does not. Let me preface my explanation by stating that outside of the RV world, I am an airline pilot.
Nitrogen is installed in aircraft tires for one reason only: combustibility. The last thing we want is to have a conflagration underneath the wing of an aircraft because that is where the fuel is stored. Any technique we can use to minimize the flammability of any component of the aircraft is something that is pursued.
That said, to answer your question relative to change in pressure as temperature changes, indeed it does. You would need to apply Gay-Lussac's Law which is P1/T1 = P2/T2. Convert all your temperatures into degrees Rankine (add 460° to your temperatures) first and then plug in your numbers and solve for P2.
Just curious... what pressure increase is seen in an aircraft tire at say, 35,000 ft? Can you estimate the tire pressure at that alt? What keeps the tire from bursting at high altitudes? Does nitrogen help vs just air in this case?
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