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Old 08-26-2012, 08:14 AM   #16
Barman
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Neon gas with opaque sidewalls...Bling!
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Old 08-26-2012, 08:15 AM   #17
Jaimoto
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Quote:
Originally Posted by Nomadix View Post
For best results, I'd suggest a mixture comprising roughly 78% nitrogen
Catalina38 uses the same percentage you guys know something we don't know.

I use beer's nitrogen and always carry a six pack just in case.
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Old 08-26-2012, 08:23 AM   #18
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Originally Posted by SE Steve View Post
snip. From what I have been told is that nitrogen molecules are larger than oxygen molecules. So over time the nitrogen filed tires will lose less air pressure from leaking through the rubber layers
Air = ~80% N2 and ~20% O2, N is 7 on the periodic table and O is 8, add some trace elements (H2O and Ar) and I think you will find the average molecule size is larger for 'air' - for whatever that is worth.

Pure N2 and O2 are both as close as to each other and to an 'ideal' gas that their PV to T relationship is virtually the same.

Pressure changes for N2 vs 'air' filled tyres are due to the water in the air evaporating (=gas), condensing (=water), freezing (=ice) - effectively taking some of the 'gas' out of the tyre.

'Air' filled tyres don't leak any more (or less) than pure N2 filled tyre - unbelievable how there is so much mythology around N2 in tyres!
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Old 08-26-2012, 08:53 AM   #19
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Originally Posted by Azmontana View Post
What hassle? It's a piece of piss to fill your tyres with Nitrogen.
Azmontana, Piss,no it isn't yellow or wetIt is a hassle every time you need to fill or adjust to have a can of Nitrogen there for that purpose. They market it as if your tires will never change PSI as you drive or temp changes,truth be known it does change just not AS much as compressed air. For someone with little experience on the reality of actually having it in one of there own rides I suppose it seems like the best thing since sliced bread. In reality if your tracking or touring tires do need adjustment and Nitrogen is not as available as the alternative, or worth the "hassle".
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Old 08-26-2012, 09:06 AM   #20
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Dry air contains roughly (by volume) 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases
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Old 08-27-2012, 01:14 PM   #21
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Originally Posted by timekeeper View Post
Azmontana, Piss,no it isn't yellow or wetIt is a hassle every time you need to fill or adjust to have a can of Nitrogen there for that purpose. They market it as if your tires will never change PSI as you drive or temp changes,truth be known it does change just not AS much as compressed air. For someone with little experience on the reality of actually having it in one of there own rides I suppose it seems like the best thing since sliced bread. In reality if your tracking or touring tires do need adjustment and Nitrogen is not as available as the alternative, or worth the "hassle".
I've had it running on my car for around a year and checked tyre pressures once a month. In that year I only had to top up with nitrogen 2 times. It's more of a hassle filling your tyres up with air every couple of months.
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Old 08-27-2012, 01:30 PM   #22
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Originally Posted by Nomadix View Post
For best results, I'd suggest a mixture comprising roughly 78% nitrogen, 21% oxygen and 1% argon. Don't worry about trace amounts of other gasses.

Also, for optimum performance and longevity, I recommend snake-oil in your engine .
Excellent balance, and it is the argon that really does the trick.
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Old 08-27-2012, 08:41 PM   #23
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Originally Posted by Peanuts View Post
I used Helium in my 990 Adv tyres. The whole bike now weighs less than my 250 EXCF.


Honest ;)

I also lube my chain with snake oil
Oh shit that's funny.
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Old 10-31-2012, 12:19 AM   #24
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Here's some additional info on the subject (relating to cagers) nitrogen in tires

Don't forget to lube your clutch cable with snake oil too...
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Old 10-31-2012, 06:38 PM   #25
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Originally Posted by Barman View Post
Neon gas with opaque sidewalls...Bling!
Nitrous Oxide filled for at night around the campfire, a bottle of Presidente' and some Led Zeppelin

......a Green Slime compressor and some hair of the dog for the morning after
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Old 10-31-2012, 06:44 PM   #26
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I guess if you've got plenty of money or a gas supplier to keep in business, it makes sense. Also, the pit racing thing might put you in the lead with Nitrogen pressured tires. The guys at Starbucks would just drool over that. Maybe you can make a buck by filling everyone's tires for, say, $3.00 per tire out of your bottle?
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Old 10-31-2012, 07:04 PM   #27
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What happens when you fill your tires with helium
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Old 11-01-2012, 08:08 AM   #28
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Originally Posted by henryroten View Post
I was thinking that with this hot summer and all the reports about tire failures I would try replacing the air in my tires with Nitrogen gas. I know that race car drivers everywhere use it as it doesn't expand with heat, keeping the tire pressure from over heating and inflating the tires to dangerous levels (Nitrogen gas is also used in shocks for the same reasons).
Nitrogen expands when hot (like any other gas ever) but it does it predictably. Which allows you to repeatedly hit the hot pressures you're looking for.

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The other benefit is that pressure should stay equal in elevation changes which are plentiful in the area where I do most of my riding (northern Utah).
Um yeah, no.
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