Home » Public Forums » GMCnet » [GMCnet] Nitrogen in tires
| [GMCnet] Nitrogen in tires [message #110084] |
Wed, 29 December 2010 07:48  |
Gary Casey
Messages: 448
Registered: September 2009
Karma: 0
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I feel the urge to reply to Desmond's statement. I've heard all sorts of
arguments about nitrogen in tires. Costco hypes it up to make a selling point.
I agree with the statement that it "doesn't make a big difference." The
argument in favor often says that nitrogen doesn't change pressure as much when
temperature changes. Hogwash. They say it doesn't permeate through the tire as
much. Hogwash. But there is a germ of truth in both statements, and the reason
is water. All compressed air systems have water in them. It would be a very,
very rare tire shop that would go to any real effort to eliminate water from
their compressed air systems. Water vapor has about half the molecular weight
of the nitrogen and oxygen in the air, so yes, it could permeate faster. But
what about the claim of less pressure change with temperature? That's also
possible, assuming the air in the tire is saturated with water - entirely
possible. Then when the temperature drops, some of the water vapor condenses
into liquid and takes up less space. This definitely would drop the pressure
more than would be expected. Filling with nitrogen brings with it the byproduct
that the water vapor has been purged from the nitrogen as part of the osmosis
process used. Elimination of water vapor is the advantage. So, yes it would be
good to fill with nitrogen, but not by a lot. Sorry, long answer to a short
question that wasn't even asked :-).
Gary Casey
The PO got his tires at Costco. Supposedly they were filled with nitrogen,
which is standard there. I never had tire pressure issues with them. The tire
shop I've known for years (out of the way in my hometown, but had my tires in
stock) say's that nitrogen doesn't make a big difference but I think I
disagree. I need to find a place to get this done.
>
> Desmond
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| Re: [GMCnet] Nitrogen in tires [message #110101 is a reply to message #110084] |
Wed, 29 December 2010 11:40  |
Jon payne
Messages: 495
Registered: May 2008
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Just as a reference point, in the aviation world nitrogen is required for tires to prevent the wheels from corroding. Since nitrogen has no moisture, as Gary mentioned, it reduces the chances of corrosion. Of course corrosion is a much bigger deal on aircraft then automobiles thus the reason for using nitrogen in aircraft tires but to use nitrogen in a car tire to eliminate corrosion is a big waste of money in my opinion. Think about, when was the last time you seen a aluminum wheel (or steel for that matter) fail because of corrosion?
Regarding Gary's comments about temperature changes and loss of pressure through the tire, based on my 20+ years of aviation experience I agree with him.
Just my 2 cents worth!
Jon
Jon Payne
76 Palm Beach
Westfield,IN
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| Re: [GMCnet] Nitrogen in tires [message #110107 is a reply to message #110084] |
Wed, 29 December 2010 12:40 |
bobby5832708
Messages: 237
Registered: November 2006
Location: Winter Springs FL
Karma: 3
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In both my GMC and my daily driver I use a blend consisting of about 78% nitrogen. Is there anything wrong with running 78% nitrogen in my tires?
Bob Heller
2017 Winnebago 29VE
Winter Springs FL
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| Re: [GMCnet] Nitrogen in tires [message #110109 is a reply to message #110107] |
Wed, 29 December 2010 12:52 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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| bobby5832708 wrote on Wed, 29 December 2010 12:40 |
In both my GMC and my daily driver I use a blend consisting of about 78% nitrogen. Is there anything wrong with running 78% nitrogen in my tires?
|
As long as you don't drop below 76.3% Nitrogen you will be OK...
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: [GMCnet] Nitrogen in tires [message #110110 is a reply to message #110084] |
Wed, 29 December 2010 13:19 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Okay, so "filling" the tire with nitrogen might have benefits, but I just don't understand how. Perhaps if the tire mounting was done in a nitrogen filled room it would make sense to me, but when the tire is mounted it's already filled with ambient air.
Granted you load in more nitrogen, but how much, as a percentage, is just air? Seems to me you are really just topping up with nitrogen.
Am I missing something? Does a tire with 30 lbs pressure have half as much air as a tire with 60 lbs pressure?
Larry Davick
On Dec 29, 2010, at 5:48 AM, Gary Casey <casey.gary@yahoo.com> wrote:
> I feel the urge to reply to Desmond's statement. I've heard all sorts of
> arguments about nitrogen in tires. Costco hypes it up to make a selling point.
> I agree with the statement that it "doesn't make a big difference." The
> argument in favor often says that nitrogen doesn't change pressure as much when
> temperature changes. Hogwash. They say it doesn't permeate through the tire as
> much. Hogwash. But there is a germ of truth in both statements, and the reason
> is water. All compressed air systems have water in them. It would be a very,
> very rare tire shop that would go to any real effort to eliminate water from
> their compressed air systems. Water vapor has about half the molecular weight
> of the nitrogen and oxygen in the air, so yes, it could permeate faster. But
> what about the claim of less pressure change with temperature? That's also
> possible, assuming the air in the tire is saturated with water - entirely
> possible. Then when the temperature drops, some of the water vapor condenses
> into liquid and takes up less space. This definitely would drop the pressure
> more than would be expected. Filling with nitrogen brings with it the byproduct
> that the water vapor has been purged from the nitrogen as part of the osmosis
> process used. Elimination of water vapor is the advantage. So, yes it would be
> good to fill with nitrogen, but not by a lot. Sorry, long answer to a short
> question that wasn't even asked :-).
> Gary Casey
>
> The PO got his tires at Costco. Supposedly they were filled with nitrogen,
> which is standard there. I never had tire pressure issues with them. The tire
> shop I've known for years (out of the way in my hometown, but had my tires in
> stock) say's that nitrogen doesn't make a big difference but I think I
> disagree. I need to find a place to get this done.
>>
>> Desmond
>
>
>
>
> _______________________________________________
> GMCnet mailing list
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] Nitrogen in tires [message #110112 is a reply to message #110110] |
Wed, 29 December 2010 13:34 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Up here in the damp and rainy Pacific Northwest, often times during this
time of the year you will see a nitrogen bottle chained very securely to a
utility pole. On the valve is a regulator and a small diameter hose that
goes to a junction box on telephone cables and I suppose cable tv that still
uses wires and not fiberoptic cables. I asked a friend of mine who used to
work for Ma Bell what the purpose of that was and he said that the nitrogen
would displace the moisture in the connectors and cables and reduce "noise"
on the lines. Since the phone & cable companies have been switching over to
fiberoptic cables they have not been as troublesome with that regard. So I
suppose nitrogen displaces moisture although I don't much see how it could
leave a gas tight tire and wheel assembly.
Jim Hupy
Salem, Or
78 GMC Royale 403
On Wed, Dec 29, 2010 at 11:19 AM, Larry Davick <ljdavick@comcast.net> wrote:
> Okay, so "filling" the tire with nitrogen might have benefits, but I just
> don't understand how. Perhaps if the tire mounting was done in a nitrogen
> filled room it would make sense to me, but when the tire is mounted it's
> already filled with ambient air.
>
> Granted you load in more nitrogen, but how much, as a percentage, is just
> air? Seems to me you are really just topping up with nitrogen.
>
> Am I missing something? Does a tire with 30 lbs pressure have half as much
> air as a tire with 60 lbs pressure?
>
> Larry Davick
>
> On Dec 29, 2010, at 5:48 AM, Gary Casey <casey.gary@yahoo.com> wrote:
>
> > I feel the urge to reply to Desmond's statement. I've heard all sorts of
> > arguments about nitrogen in tires. Costco hypes it up to make a selling
> point.
> > I agree with the statement that it "doesn't make a big difference." The
> > argument in favor often says that nitrogen doesn't change pressure as
> much when
> > temperature changes. Hogwash. They say it doesn't permeate through the
> tire as
> > much. Hogwash. But there is a germ of truth in both statements, and the
> reason
> > is water. All compressed air systems have water in them. It would be a
> very,
> > very rare tire shop that would go to any real effort to eliminate water
> from
> > their compressed air systems. Water vapor has about half the molecular
> weight
> > of the nitrogen and oxygen in the air, so yes, it could permeate faster.
> But
> > what about the claim of less pressure change with temperature? That's
> also
> > possible, assuming the air in the tire is saturated with water - entirely
> > possible. Then when the temperature drops, some of the water vapor
> condenses
> > into liquid and takes up less space. This definitely would drop the
> pressure
> > more than would be expected. Filling with nitrogen brings with it the
> byproduct
> > that the water vapor has been purged from the nitrogen as part of the
> osmosis
> > process used. Elimination of water vapor is the advantage. So, yes it
> would be
> > good to fill with nitrogen, but not by a lot. Sorry, long answer to a
> short
> > question that wasn't even asked :-).
> > Gary Casey
> >
> > The PO got his tires at Costco. Supposedly they were filled with
> nitrogen,
> > which is standard there. I never had tire pressure issues with them.
> The tire
> > shop I've known for years (out of the way in my hometown, but had my
> tires in
> > stock) say's that nitrogen doesn't make a big difference but I think I
> > disagree. I need to find a place to get this done.
> >>
> >> Desmond
> >
> >
> >
> >
> > _______________________________________________
> > GMCnet mailing list
> > List Information and Subscription Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: [GMCnet] Nitrogen in tires [message #110129 is a reply to message #110107] |
Wed, 29 December 2010 16:24 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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| bobby5832708 wrote on Wed, 29 December 2010 12:40 |
In both my GMC and my daily driver I use a blend consisting of about 78% nitrogen. Is there anything wrong with running 78% nitrogen in my tires?
|
I have been running the same stuff for years with no real complaint. It is also cheaper and more readily available than the 99% stuff.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Nitrogen in tires [message #110130 is a reply to message #110084] |
Wed, 29 December 2010 16:22 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Gary,
I agree with what you've noted below putting Nitrogen in the tires doesn't
buy you much, however. . . .
One extremely clever automotive engineer here (I think he works for Holden)
came up with the idea of using Helium in the tires. It wasn't an original
idea as a Ford engineer came up with the idea of using Hydrogen.
Unfortunately while driving the test vehicle in the Outback he hit a huge
pothole on a hot day during the summer and the ensuing explosion ended the
test series. Fortunately he was not injured severely (just his pride
basically).
Companies that provide the service here have noted by using Helium you will
reduce the weight of your vehicle and increase your petrol mileage HEAPS!
Unfortunately there is a technical down side to using helium. The helium
atom having only two electrons, two protons, and two neutrons makes it a lot
skinnier than fat old nitrogen atom with SEVEN electron, SEVEN protons, and
SEVEN neutrons and it can squeeze through the tiniest defect in the wheel or
tire and therefore it is imperative that make sure your wheels and tires are
in tip top condition and you carry a bottle of Helium with you in your
vehicle.
Unfortunately teenagers have found that they can tell when a vehicle has
helium in its tires. They will cruise parking lots and try to lift vehicles
as they've learned that the ones that they can get off the ground have
helium in the tires. Once they've determined that they will take their pen
knives and pop open the tire valves and breath in the Helium. It is not
uncommon to spot a group hanging around a vehicle and hear them all "talking
funny" and laughing uncontrollably.
Using helium in the tires has a compound effect, as you know Australia is in
the southern hemisphere and being upside down the effects of gravity are
lessened a great deal. I think that's why I seem to have more energy when I
return to Australia from the USA, the weight these poor old bones has to
carry drops significantly! Sorry I digress.
Getting back to the point the reduced gravity reduces the vehicle weight
significantly and in conjunction with the helium in the tires the gas
mileage we get can be up to double that of the exact same vehicle in the
northern hemisphere. How else to you think we can afford to drive motor
vehicles when petrol costs $1.26 per liter. That works out to $4.77 per
gallon US!
In fact the reduction in petrol consumption is so significant that the
petrol companies here have engaged a team of lawyers to challenge the use of
Helium in the tires. They want it banned on the grounds that it is unsafe!
The reduced weight caused by using Helium in the tires reduces the
coefficient of friction between the tires and the road surface resulting in
longer stopping distances. They maintain that their lawsuit has nothing to
do with trying to increase profits they feel they are performing a public
service as it is their duty to protect the motoring public!
They note that if they are successful in their case they will be bringing a
follow up case challenging the laws of gravity. They insist the levels of
gravity should be increased to further protect the motoring public.
Regards,
Rob M.
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Gary Casey
Sent: Thursday, December 30, 2010 12:48 AM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] Nitrogen in tires
I feel the urge to reply to Desmond's statement. I've heard all sorts of
arguments about nitrogen in tires. Costco hypes it up to make a selling
point.
I agree with the statement that it "doesn't make a big difference." The
argument in favor often says that nitrogen doesn't change pressure as much
when
temperature changes. Hogwash. They say it doesn't permeate through the
tire as
much. Hogwash. But there is a germ of truth in both statements, and the
reason
is water. All compressed air systems have water in them. It would be a
very,
very rare tire shop that would go to any real effort to eliminate water from
their compressed air systems. Water vapor has about half the molecular
weight
of the nitrogen and oxygen in the air, so yes, it could permeate faster.
But
what about the claim of less pressure change with temperature? That's also
possible, assuming the air in the tire is saturated with water - entirely
possible. Then when the temperature drops, some of the water vapor
condenses
into liquid and takes up less space. This definitely would drop the
pressure
more than would be expected. Filling with nitrogen brings with it the
byproduct
that the water vapor has been purged from the nitrogen as part of the
osmosis
process used. Elimination of water vapor is the advantage. So, yes it
would be
good to fill with nitrogen, but not by a lot. Sorry, long answer to a short
question that wasn't even asked :-).
Gary Casey
The PO got his tires at Costco. Supposedly they were filled with nitrogen,
which is standard there. I never had tire pressure issues with them. The
tire
shop I've known for years (out of the way in my hometown, but had my tires
in
stock) say's that nitrogen doesn't make a big difference but I think I
disagree. I need to find a place to get this done.
>
> Desmond
_______________________________________________
GMCnet mailing list
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http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Nitrogen in tires [message #110132 is a reply to message #110130] |
Wed, 29 December 2010 16:37 |
storm'n
Messages: 492
Registered: April 2007
Location: Ont. Can
Karma: 0
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Senior Member |
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Somebody has too much time on their hands. That 500 Caddy better get there soon.
--- On Wed, 12/29/10, Rob Mueller <robmueller@iinet.net.au> wrote:
Gary,
I agree with what you've noted below putting Nitrogen in the tires doesn't
buy you much, however. . . .
One extremely clever automotive engineer here (I think he works for Holden)
came up with the idea of using Helium in the tires. It wasn't an original
idea as a Ford engineer came up with the idea of using Hydrogen.
Unfortunately while driving the test vehicle in the Outback he hit a huge
pothole on a hot day during the summer and the ensuing explosion ended the
test series. Fortunately he was not injured severely (just his pride
basically).
Companies that provide the service here have noted by using Helium you will
reduce the weight of your vehicle and increase your petrol mileage HEAPS!
Unfortunately there is a technical down side to using helium. The helium
atom having only two electrons, two protons, and two neutrons makes it a lot
skinnier than fat old nitrogen atom with SEVEN electron, SEVEN protons, and
SEVEN neutrons and it can squeeze through the tiniest defect in the wheel or
tire and therefore it is imperative that make sure your wheels and tires are
in tip top condition and you carry a bottle of Helium with you in your
vehicle.
Unfortunately teenagers have found that they can tell when a vehicle has
helium in its tires. They will cruise parking lots and try to lift vehicles
as they've learned that the ones that they can get off the ground have
helium in the tires. Once they've determined that they will take their pen
knives and pop open the tire valves and breath in the Helium. It is not
uncommon to spot a group hanging around a vehicle and hear them all "talking
funny" and laughing uncontrollably.
Using helium in the tires has a compound effect, as you know Australia is in
the southern hemisphere and being upside down the effects of gravity are
lessened a great deal. I think that's why I seem to have more energy when I
return to Australia from the USA, the weight these poor old bones has to
carry drops significantly! Sorry I digress.
Getting back to the point the reduced gravity reduces the vehicle weight
significantly and in conjunction with the helium in the tires the gas
mileage we get can be up to double that of the exact same vehicle in the
northern hemisphere. How else to you think we can afford to drive motor
vehicles when petrol costs $1.26 per liter. That works out to $4.77 per
gallon US!
In fact the reduction in petrol consumption is so significant that the
petrol companies here have engaged a team of lawyers to challenge the use of
Helium in the tires. They want it banned on the grounds that it is unsafe!
The reduced weight caused by using Helium in the tires reduces the
coefficient of friction between the tires and the road surface resulting in
longer stopping distances. They maintain that their lawsuit has nothing to
do with trying to increase profits they feel they are performing a public
service as it is their duty to protect the motoring public!
They note that if they are successful in their case they will be bringing a
follow up case challenging the laws of gravity. They insist the levels of
gravity should be increased to further protect the motoring public.
Regards,
Rob M.
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Gary Casey
Sent: Thursday, December 30, 2010 12:48 AM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] Nitrogen in tires
I feel the urge to reply to Desmond's statement. I've heard all sorts of
arguments about nitrogen in tires. Costco hypes it up to make a selling
point.
I agree with the statement that it "doesn't make a big difference." The
argument in favor often says that nitrogen doesn't change pressure as much
when
temperature changes. Hogwash. They say it doesn't permeate through the
tire as
much. Hogwash. But there is a germ of truth in both statements, and the
reason
is water. All compressed air systems have water in them. It would be a
very,
very rare tire shop that would go to any real effort to eliminate water from
their compressed air systems. Water vapor has about half the molecular
weight
of the nitrogen and oxygen in the air, so yes, it could permeate faster.
But
what about the claim of less pressure change with temperature? That's also
possible, assuming the air in the tire is saturated with water - entirely
possible. Then when the temperature drops, some of the water vapor
condenses
into liquid and takes up less space. This definitely would drop the
pressure
more than would be expected. Filling with nitrogen brings with it the
byproduct
that the water vapor has been purged from the nitrogen as part of the
osmosis
process used. Elimination of water vapor is the advantage. So, yes it
would be
good to fill with nitrogen, but not by a lot. Sorry, long answer to a short
question that wasn't even asked :-).
Gary Casey
The PO got his tires at Costco. Supposedly they were filled with nitrogen,
which is standard there. I never had tire pressure issues with them. The
tire
shop I've known for years (out of the way in my hometown, but had my tires
in
stock) say's that nitrogen doesn't make a big difference but I think I
disagree. I need to find a place to get this done.
>
> Desmond
_______________________________________________
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_______________________________________________
GMCnet mailing list
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_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
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| Re: [GMCnet] Nitrogen in tires [message #110162 is a reply to message #110084] |
Wed, 29 December 2010 19:43 |
Gary Casey
Messages: 448
Registered: September 2009
Karma: 0
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Senior Member |
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I once bought a Porsche 928 in sort of dingy condition. When I dismounted the
tires the aluminum rims were almost completely eaten through from the inside
out. There was liquid water in side the tires. I think I said before that if I
had the choice I would put nitrogen in my tires, but I wouldn't go too far out
of my way to do it. Large aircraft have very, very, very expensive wheels, but
most have inner tubes (don't they?). At the higher pressures used - 200 psi and
up - compressing air gets a little dangerous. Easier to just use a bottle of
nitrogen. A bottle of compressed air at 2000 psi would also work, but nitrogen
is more convenient. My airplane tires with tubes have air in them, but the nose
gear strut has nitrogen - the parts are more expensive! Incidentally, on the
plane tires I bought special Michelin "low permeability" tubes and the tires
hold air for a whole year.
Gary Casey
Just as a reference point, in the aviation world nitrogen is required for tires
to prevent the wheels from corroding. Since nitrogen has no moisture, as Gary
mentioned, it reduces the chances of corrosion. Of course corrosion is a much
bigger deal on aircraft then automobiles thus the reason for using nitrogen in
aircraft tires but to use nitrogen in a car tire to eliminate corrosion is a big
waste of money in my opinion. Think about, when was the last time you seen a
aluminum wheel (or steel for that matter) fail because of corrosion?
Regarding Gary's comments about temperature changes and loss of pressure through
the tire, based on my 20+ years of aviation experience I agree with him.
Just my 2 cents worth!
Jon
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| Re: [GMCnet] Nitrogen in tires [message #110167 is a reply to message #110110] |
Wed, 29 December 2010 20:32 |
 |
Hardie Johnson
Messages: 483
Registered: January 2004
Location: Raleigh NC
Karma: 0
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Senior Member |
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| ljdavick wrote on Wed, 29 December 2010 14:19 |
Okay, so "filling" the tire with nitrogen might have benefits, but I just don't understand how. Perhaps if the tire mounting was done in a nitrogen filled room it would make sense to me, but when the tire is mounted it's already filled with ambient air. <>
Am I missing something? Does a tire with 30 lbs pressure have half as much air as a tire with 60 lbs pressure?
Larry Davick
<>
|
All you are missing is the essential BS that is the initial element of this fraud. As with most other energy saving, mileage increasing majik magnetic devices, etc., the improvement comes not from filling with nitrogen or whatever, it comes from the driver having a sharpened awareness of economy. This results in smoother driving for a while and produces the results of better apparent economy.
Your point is exactly right, but moisture is a consideration for common compressors have no mechanism to reduce moisture. Nitrogen comes from a bottle and is dry.
From a racing article:
"Air is 78 percent nitrogen, 21 percent oxygen, and 0.9 percent argon. The remaining 0.1 percent is a mixture of other gases. Air is mostly nitrogen already, so why bother with the 22 percent of air that's not nitrogen? The problem isn't the oxygen--it's water vapor that is often mixed in with the air. The pressure exerted by water molecules in the tire can change significantly near water's boiling temperature of 212°F (lOO°C). Small temperature changes in that region can produce large pressure changes."
Race tires get to 300*F, ours should not be over 212*F so that is not the concern.
Hardie Johnson "Crashj"
1973 26 foot Glacier, White Thing
Raleigh NC
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| Re: [GMCnet] Nitrogen in tires [message #110225 is a reply to message #110084] |
Thu, 30 December 2010 09:46 |
Gary Casey
Messages: 448
Registered: September 2009
Karma: 0
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Senior Member |
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Larry raises a valid question. The tire, before it is pressurized, has about 15
psi (absolute) of air in it. When you pressurize the tire to 60 psi according
to a gauge it actually has 75 psi absolute, or about 5 times as much. So if it
were filled with 100% nitrogen, it would still be 1/5th air, or about 4% oxygen.
And very little water vapor. A passenger car tire filled to 30 psi would still
be 1/3 air. Worth the trouble? I certainly wouldn't buy my tires at Costco
just to get nitrogen in them. So it's not just useless hype, and it's worth
something, I suppose.
Gary Casey
ljdavick wrote on Wed, 29 December 2010 14:19
> Okay, so "filling" the tire with nitrogen might have benefits, but I just don't
>understand how. Perhaps if the tire mounting was done in a nitrogen filled room
>it would make sense to me, but when the tire is mounted it's already filled with
>ambient air. <>
> Am I missing something? Does a tire with 30 lbs pressure have half as much air
>as a tire with 60 lbs pressure?
>
> Larry Davick
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I also use the 78% nitrogen mix in my tires, but I try to be sure they also put ~20% oxygen in as I feel the mix works better. I have my compressor at home set to this mixture, and have had no problems with it for the last 58 years.