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Old 07 February 2007, 16:28   #1
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Nitrogen, anyone?

I'm friendly with some members of a local fire department that has a 19' RIB. I stopped in the other day and they were complaining about how they always have to pump their tubes up whenever they bring the RIB outside in the winter from the warm station.

One guy asked me if they could inflate the tubes with Nitrogen! At first I thought they were on crack - but then they explained that you can buy nitrogen canisters at the local autostore to inflate car tires as nitrogen is less susceptible to temperature than oxygen. After some thought, I guess it makes sense for RIBs, if there's no harm. What do you all think?

Anyone ever put Nitrogen in their tubes?
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Old 07 February 2007, 16:37   #2
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Kwik Fit, A UK National tyre company used to put a nitrogen mixture in tyres many years ago. Don't know if they still do. It was explained to me that it kept the moisture out of the tyres and therefore kept the pressure more steady irrelevant of the tyre temperature.
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Old 07 February 2007, 17:02   #3
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Did someone else not suggest this a while back, and reach the conclusion that nitrogen was more likely to find a way of escaping through any poor seams?
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Old 07 February 2007, 21:09   #4
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Jimbo,

As good an idea as it might be the problem is its going to cost a bit of money to pump the average RIB up with Nitrogen for the small gain in maintanence.

I'm off to Kwik Fit soon I'll ask them how much to pump up a RIB.

But if it leaks worse than air I know one little island it won't be taking off in. Stephen L.
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Old 08 February 2007, 00:22   #5
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Won't be any worse than air, and *may* have the benefit of being a bit more temp stable, and a little less oxidizing.

Remember, air is already 71 percent N2. If leakage was a problem you'd see it with air as well.

FWIW, Costco fills tires with N2 now, citing temp stability as the reason.

jky
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Old 08 February 2007, 07:43   #6
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Quote:
Originally Posted by jyasaki View Post
Won't be any worse than air, and *may* have the benefit of being a bit more temp stable, and a little less oxidizing.

Remember, air is already 71 percent N2. If leakage was a problem you'd see it with air as well.

FWIW, Costco fills tires with N2 now, citing temp stability as the reason.

jky
Just going to say that - it's helium that will leak out of anything!!!

As you say air is already mainly Nitrogen so doubt it will make much difference.
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Old 08 February 2007, 08:11   #7
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Just going to say that - it's helium that will leak out of anything!!!
Ah, that was it, someone suggested helium in the tubes for less weight. I'll shut up and crawl back to whence I came now
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Old 08 February 2007, 08:47   #8
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Nitrogen Works. keeps my toobs from Exploadin in the Summer Sun,and from shrinkage do to cold water condesing the air in the toobs, unaffected by temp' , used in race car tires for the same reason.
if it's got a leak or a bad seam, it's guna leak or pop nomater what you put in it.

runin 7psi in the Main toobs, 12psi+ in the Speed toob, ribs, most, are 3-5psi
in the toob.
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Old 08 February 2007, 11:58   #9
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Sounds like it's worth a try. Can anyone think of any downsides? Now all you have to do is figure out where to get enough Nitrogen to fill the tubes... any thoughts? I guess for a fire department that's probably not a big problem.
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Old 08 February 2007, 12:07   #10
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Ah, that was it, someone suggested helium in the tubes for less weight. I'll shut up and crawl back to whence I came now
LOL.

Yeah, helium will leak out pretty quickly through any kind of gap (or through the fabric if there is no gap.)

Besides that, there's currently a dearth of helium in the US since one of the two primary helium generation plants burned down (or something like that.) Lots of industry having a hard time getting what they need to stay in business (or were, a few weeks ago.)

jky
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