Natural compressed air will leak/seep at a faster rate than Nitrogen which
gives a softer tire that heats up faster. If we all checked our tires more
frequently and kept the pressure where it should be this would all be wasted
band width. I check the tries on all my vehicles on a weekly basis and more
frequently as the temperature changes as I travel. Would I pay extra for
Nitrogen in my tires? No, because I maintain them correctly! My sister
meanwhile is lucky if she checks her tires between flats and blowouts! She
would benefit from using Nitrogen....
Fred
-----Original Message-----
From: Diesel-RVs@yahoogro
Behalf Of Bill Halberstadt
Sent: Wednesday, January 02, 2008 1:04 PM
To: Diesel-RVs@yahoogro
Subject: [Diesel-RVs] Re: 07 Toyota/Nitrogen
Fred, why in the world do you think that nitrogen filled tires do not
get as hot as dry air filled tires? There in nothing about nitrogen
that could possibly affect the buildup of heat.
Bill Halberstadt
--- In HYPERLINK
"mailto:Diesel-
<havasu01@..
>
> Bill, Your statement is correct; however, the difference is that
> Nitrogen filled tires do not get as hot as "dry" air filled
> tires... ergo, the pressure does not increase.
>
> Fred
> -----Original Message-----
> From: HYPERLINK
"mailto:Diesel-
[mailto:HYPERLINK
"mailto:Diesel-
> Behalf Of Bill Halberstadt
> Sent: Wednesday, January 02, 2008 8:08 AM
> To: HYPERLINK
"mailto:Diesel-
> Subject: [Diesel-RVs] Re: 07 Toyota/Nitrogen
>
>
>
> That's just not true. Dry air and nitrogen have exactly the same
> pressure rise with temperature. Air with some moisture in it will have
> a very slightly higher pressure rise with temperature (negligible for
> our uses). That's why I said you can avoid even that slight difference
> by using the dry air that comes from your dryer-equipped motorhome air
> system.
>
> Warning: Technical trivia follows: The "ideal gas laws" show that, for
> a fixed volume (roughly the case for our tires), with dry air,
> nitrogen or any other ideal gas, if you double the temperature, you
> will double the pressure. The "trick" is you have to use absolute
> units for the measured temperature and pressure. E.G. psia and
> kelvins. Temperature in kelvins is equal to degrees Celsius plus
> 273.15. Psia is psig plus 14.7 (with a slight correction for
> altitude). Water vapor is not an "ideal gas", so it behaves somewhat
> differently.
>
> So, if you are really paranoid about pressure rise with temperature
> (e.g. driving your rig in a NASCAR race, where 1/2 psi matters), the
> trick is to use dry air. Nitrogen is one relatively expensive way to
> do this. Having a dryer on your compressed air supply is another
> way.
>
> Bill Halberstadt
>
> --- In HYPERLINK
> "mailto:Diesel-
> "mydogscar" <markhovanec@
> >
> > Here's what I mean by stable. Check your tires temperature cold,
> > and then hot. It will be different. With nitrogen it's the same.
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