Go back to school Les!
-----Original Message-----
From: Diesel-RVs@yahoogro
Behalf Of lshields20
Sent: Wednesday, January 02, 2008 1:46 PM
To: Diesel-RVs@yahoogro
Subject: [Diesel-RVs] Re: 07 Toyota/Nitrogen
I "think" the air loss through migration is mostly in one's
imagination. If nitrogen did "migrate" through the tire more slowly
than oxygen does, what would happen? Some oxygen would migrate through
the tire leaving the nitrogen behind. Add plain air to make up and the
process repeats. After several such episodes, what do you have left in
the tire? It would be nearly pure nitrogen. The process called gaseous
diffusion and is one method that can be used to enrich uranium for
fissile purposes.
Loss through the valve stem is much greater than through the "pores"
in the rubber.
I must have the best set of Michelins ever made on my 2004 Dutch Star.
For the first two years I owned it, I never added air (and I do check
them frequently). I have added air about twice since then. Both times
were to compensate for me reducing pressure while traveling in the
south, then adding air to make up during cold months up north.
I highly suspect the transition between summer and winter is the main
reason people find they need to add a couple pounds to their tires.
The ambient temperature change between summer (say 80 degrees) and
winter (say 20 degrees) is enough to cause a several pound change in
pressure. At least a pound a month from summer to winter.
I don't believe Costco is run by idiots. I think it is run by very
good marketing people. If a store can provide a perceived value
(whether or not it is an actual value) when selling a commodity item
(a particular tire is pretty much the same no matter where you buy
it), people are more likely to buy where they get the perceived value.
Les
>
> Then why does Costco fill all the tires they sell with nitrogen. You
> cannot buy nitrogen from them--it is only something they provide at no
> cost for their new tires. I don't believe that Costco is run by idiots.
> There must be some value. In my case, the only difference I've seen
is a
> much, much lower of air loss due to migration. But that is a very
> worthwhile difference for me.
>
> Bob Clerc
> @ Casa Grande, AZ
>
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.516 / Virus Database: 269.17.13/1207 - Release Date: 1/2/2008
11:29 AM
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.516 / Virus Database: 269.17.13/1207 - Release Date: 1/2/2008
11:29 AM
[Non-text portions of this message have been removed]
Off-topic posts will be removed.
Please sign with your name (real or online name) and include the RV model you have.
To unsubscribe from this group, send an email to
Diesel-RVs-unsubscribe@egroups.com
Earn your degree in as few as 2 years - Advance your career with an AS, BS, MS degree - College-Finder.net.
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch format to Traditional
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe
__,_._,___
No comments:
Post a Comment