[Vwdiesel] TDI tires

[James Hansen]

There is so much nonsense flying around this nitrogen in tires bit, it's a
big tires sales gimmick.  The ONLY measurable advantage you get is the fact
that it is DRY gas going in to the tire, not carrying a level of humidity.
Humidity levels in the tire exacerbate the change in pressure experienced
when temperatures rise in use. So the tire droid wet mounts the tire with
soap and water, away goes the advantage, then uses nitrogen to fill and acts
like he's using space shuttle technology. 
You can achieve the exact same results with using dry air, that has been
dried on purpose through a dessicant or refrigerant dryer.
  
That said, we use nitrogen on the race cars, mainly because we can buy a
relatively inexpensive tank of the stuff and not have to have another piece
of equipment to maintain at the track to run air guns and fill tires, and it
lasts 2 seasons per tank.  To fill properly, you need to fill, drain, fill
drain, to purge the moisture from the interior to have any advantage
whatsoever- it does not take much water in there at all. 
If the hole is big enough to let out O2 and CO2, N2 will follow. Physically,
yes, N2 is bigger, but we use these silly thin race tires, and they leak
down through the sidewall over time same as with air. 

To use their logic, if you fill your tire, let all the small molecules leak
out (no more than 20% is possible) then refill, you have concentrated the
nitrogen in your tires.  Do it a few times, and you have nearly pure
nitrogen in the tire, which you could then sell to the tire shop... hmmm.
-james

-----Original Message-----
From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com] On
Behalf Of LBaird119 at aol.com
Sent: February-29-12 11:06 AM
To: Vwdiesel at vwfans.com
Subject: Re: [Vwdiesel] TDI tires

 
In a message dated 2/29/2012 3:26:28 A.M. Pacific Standard Time,
toensing at wildblue.net writes:

The  benefit of nitrogen is slower loss of air as I am told nitrogen
molecules are  larger than other air molecules.





I've always wondered just HOW much benefit there really is from  that, 
considering the atmosphere is nearly 80% nitrogen.  I would think  moisture 
content would have more to do with it than the fact that it's 20% more
nitrogen.
   Loren
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