Besides the marketing angle to make a few $$$, the only possible benefit are
for clueless folks who never check their tire air (I can think of a few
family members as I write this). They have a better chance of keeping a
consistent tire pressure over the 6-12 months before the tires get checked
again (most likely at oil change time).
For the rest of us who check tires more regularly, it's a waste.
Planes and race tires are the useful applications for it that I can see.
Ron Porter
-----Original Message-----
From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
On Behalf Of av8r567@optonline.net
Sent: Tuesday, August 01, 2006 1:24 PM
To: shotimes@autox.team.net
Subject: [Shotimes] Nitrogen-filled tires
I know we talked about this on the list a while back.
http://news.yahoo.com/s/ap/20060731/ap_on_bi_ge/nitrogen_tires
"Skeptics will question how much can be gained by filling tires with pure
nitrogen when the air we breathe is 78 percent nitrogen."
Being a skeptic (and an engineer) I will and do question this. Correct me
if I'm wrong, but when a tire is mounted on a rim, doesn't "regular air" get
trapped inside???? Even if pure Nitrogen is used to "pop" the tire bead
onto the rim there's still "regular air" inside that will be mixed with the
Nitrogen. Soooo, you don't end up with a tire filled with 100% Nitrogen.
The only way to ensure 100% Nitrogen inside the tire is if the tire mounting
machine were inside a sealed room filled with Nitrogen and the installer had
to wear an Oxygen mask. Is that what the tire dealer purchases for $3,000
to $12,000 dollars? What am I missing here?
What if it's Sunday night and my tire(s) are a few psi low? If the local
Gas 'n Sip doesn't have Nitrogen, then what good is having Nitrogen in my
tires?
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