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Old 11-29-2008, 12:47 AM   #29
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[quote=Action;642972]Interesting, today the RF tire went rim flat on my wife's car. Pumped it up with reg dried compressed air. Found a nail in the tread. Will have to get it fixed tommorrow.

Hi, but if you had Nitrogen in your tire the nail wouldn't rust.
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Old 11-29-2008, 07:28 AM   #30
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Good point!

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Old 11-29-2008, 12:17 PM   #31
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Originally Posted by Larry in MO View Post
I'm not sure I'd want to spend a Saturday trying to put 6 oz of glass beads in the tire valve stem, however.
The beads are usually installed by breaking down the bead of the tire, and tossing a degradable bag containing the beads into the tire, and reinflating the tire.
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Old 11-29-2008, 12:29 PM   #32
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Just a thought -- isn't there several cubic feet of amibient air in the tire, uncompressed, as it sits mounted but yet to be filled? So you put in your $10 of nitrogen but you still have traces of oxygen, carbon dioxide, trace gasses and moisture. It'ss not like they vacuum the tire down before filling with N.

Personally, I vote for the 78% nitrogen "au naturale" product.

mike
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Old 11-29-2008, 02:29 PM   #33
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I shoulda thought of that.............

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Originally Posted by overlander63 View Post
The beads are usually installed by breaking down the bead of the tire, and tossing a degradable bag containing the beads into the tire, and reinflating the tire.
Thanks, Terry. That oughta speed things.
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Old 11-29-2008, 03:48 PM   #34
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Wouldn't the beads degrade the inside of the tire? I know the company says it won't, but I find that hard to believe. I guess it's the same principal as the Centramatic, but cheaper. How much do the beads cost? How do you get the tire installer to save them from the old tires?

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Old 11-29-2008, 05:10 PM   #35
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Update - the nail ended the service life of the tire. Bought new set of French tires. Use compressed air for inflation.

Discount was the vendor. Costco was about $100 more for the same set. So I passed on the N from the Costco store.

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Old 11-29-2008, 09:09 PM   #36
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Wouldn't the beads degrade the inside of the tire? I know the company says it won't, but I find that hard to believe. I guess it's the same principal as the Centramatic, but cheaper. How much do the beads cost? How do you get the tire installer to save them from the old tires?

Gene
The beads are single-use, that is, you get a new bag installed when you R&R the tire. Most bags I've seen run about $10 or so.
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Old 11-29-2008, 10:09 PM   #37
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We ran Nitrogen in our racing karts, but only after years of tweeking every variable and understanding the result. The only reason we used it was we would adjust airpressure in each tire independent and used +-.5 PSI to adjust the handling. The tire pressure would jump 2-3 psi as the tires heated when we used air, 1-2 when we ran Nitrogen.
When I see a need to tweek my trailer tires based on road conditions, understeer, oversteer, turn-in.... I'll start totin' a tube of nitrogen....till then I'll pump up the atmosphere and stuff it into the tire...
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Old 11-29-2008, 10:55 PM   #38
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Purge the old air?

Quote:
Originally Posted by n2916s View Post
Just a thought -- isn't there several cubic feet of amibient air in the tire, uncompressed, as it sits mounted but yet to be filled? So you put in your $10 of nitrogen but you still have traces of oxygen, carbon dioxide, trace gasses and moisture. It'ss not like they vacuum the tire down before filling with N.

Personally, I vote for the 78% nitrogen "au naturale" product.

mike
Hi, [example] when doing a proper A/C service or repair, you vacuum the system to as close to 30" vacuum as possible before refilling with refrigerant; If you were to try doing this to tires and wheels, you would probably pull the tire off of the bead. so the tire is still, basically full of air, at zero pounds pressure. What percentage is the nitrogen at 65 lbs and how can you prove it? And if nitrogen is air with the moisture/water removed, what makes the molecules larger? Do the swell up or expand?
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