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Old 11-27-05, 11:55 AM   #1
AEsco48
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Anyone use Nitrogen instead of Air in their Air Shocks?

like used in most other shock applications
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Old 11-27-05, 12:01 PM   #2
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Different types of seals aren't they. Most other shock applications use nitro shocks I believe.
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Old 11-27-05, 12:07 PM   #3
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Originally Posted by Maelstrom
Different types of seals aren't they. Most other shock applications use nitro shocks I believe.
I used to use Nitrox to scuba dive, just wondering why you use it in tires?
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Old 11-27-05, 12:11 PM   #4
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huh?
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Old 11-27-05, 12:11 PM   #5
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huh?
my thought exactly
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Old 11-27-05, 12:14 PM   #6
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huh?
Pretty deep question, can't you answer my question or did you not read that far?
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Old 11-27-05, 12:17 PM   #7
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You question makes 0 sense in the context of the post. I am not talking about tires. If I am wrong about shocks cool, but tires? I am pretty sure I use air.

Before attempting an insult try and keep the respond in line with the question. If I had come out and said "your underwear is pink" it would have made about as much sense.
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Old 11-27-05, 12:21 PM   #8
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Scuba diving "Nitrox" is a completely different composition then the Nitrogen gas used in race car tires and shocks...that gas is nearly 100% nitrogen...hence its called nitrogen gas....

ref the seals...i thought of that but kind of put that though of to the side....

should have also asked if any of the mountain bike/DH shocks do currently use nitrogen
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Old 11-27-05, 12:22 PM   #9
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Pretty deep question, can't you answer my question or did you not read that far?
did you skip the whole theoretical part of getting Nitrox certified?
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Old 11-27-05, 12:26 PM   #10
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Quote:
Originally Posted by Maelstrom
You question makes 0 sense in the context of the post. I am not talking about tires. If I am wrong about shocks cool, but tires? I am pretty sure I use air.

Before attempting an insult try and keep the respond in line with the question. If I had come out and said "your underwear is pink" it would have made about as much sense.

Nitrogen is used in hi performance tire applications b\c for a given delta temp change there is a smaller delta pressure change in the tire then if regular atmospheric air was used....one of the reasons being there is no water vapor in Nitrogen...and in compressed air there is a water vapor
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Old 11-27-05, 12:31 PM   #11
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I remember reading something on ridemonkey that nitro wouldn't work in pure air shocks because it would seap through the seals. Not 100% sure though.

Aren't most coil overs nitro? Also I believe a lot of shocks use remote resevoirs that do use nitro. Avy DHS is one that is built like that. Fox Vanilla is also a shock that has a nitro charge.
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Old 11-27-05, 12:33 PM   #12
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Quote:
Originally Posted by AEsco48
Nitrogen is used in hi performance tire applications b\c for a given delta temp change there is a smaller delta pressure change in the tire then if regular atmospheric air was used....one of the reasons being there is no water vapor in Nitrogen...and in compressed air there is a water vapor
Which makes total sense. I do understand the reasoning, just not the context in relation to your question about air shocks on bikes. Maybe I just don't see why the statement pertains.
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Old 11-27-05, 12:39 PM   #13
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i was gonna say that, a lot of race cars inflate the tires and such with nitrogen, supposed to be less intensive then air.
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Old 11-27-05, 01:08 PM   #14
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Nitrogen in tires always cracks me up. The Earth's atmosphere is 78% nitrogen. In order to get 100% nitrogen in a tire, you would also first have to remove any existing air in the tire. It's a waste of time.
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Old 11-27-05, 02:14 PM   #15
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Do you even have a clue what you're talking about? Nitrogen is compressed and put into tires through an air hose, just like air, so how is that a waste of time? Also even if it is a little harder to do the performance gains in the world of racing (automoblie atleast) are worth the cost. The difference of 2-3 PSI in a tire could completely screw up the handling of a race car which could prove to be potentially dangerous. As nitrogen is heated it expands much less than typical air.
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Old 11-27-05, 02:33 PM   #16
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Quote:
Originally Posted by Maelstrom
Which makes total sense. I do understand the reasoning, just not the context in relation to your question about air shocks on bikes. Maybe I just don't see why the statement pertains.
on a 5 mile decent, a shock might cycle 2000 times...that generates heat which causes expansion...and that heat is also transfered to the oil (in an oil/air shock)...if the oil boils....the shock fails due to the air bubbles int he oil....
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Old 11-27-05, 02:38 PM   #17
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Again thats its purpose. But why did the other guy pull in the reference. I completely understand WHY it is needed but the reference still makes no sense.

I meantioned seals and he mentions my tires? The line of thought doesn't apply. You wanted to know about shocks and he mentioned tires. oh well looks like this is a gigantic line of miscommunication. I am out. My response is above. There are other people here who likely know the principle of nitro in air shocks better than I do. I still remember there being a leakage issue in the seal of the shock but couldn't find the reference I was looking for.
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Old 11-27-05, 02:49 PM   #18
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Quote:
Originally Posted by JBehrmann
Nitrogen in tires always cracks me up. The Earth's atmosphere is 78% nitrogen. In order to get 100% nitrogen in a tire, you would also first have to remove any existing air in the tire. It's a waste of time.
Yea....thats why we use a non-water based tire bead lubricant when mounting the tires (water based would boil and introduce water vapor, thus neglecting the point of using nitrogen which is dry)....we then evacuate the tire while mounted on the wheel, fill it with nitrogen, evacuate it again and then refill with nitrogen.....

there can be a delta 2-3psi final difference difference in tire pressure when using air vs nitrogen....you are thinking well you adjust your initial pressure so that the final pressure is the same if you use air or nitrogen....but what you are not realizing is that the less pressure difference between initial and final pressure means there is less difference between a cars handling between initial and final pressure

to put it into perspective how its not a waste, Formula 1 teams make half (.5) PSI tire pressure changes....

And when top Formula 1 teams spend between 600 million and 1 Billion USD....its not a waste
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Old 11-27-05, 03:50 PM   #19
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Nice to see someone knows what they're talking about.
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Old 11-27-05, 06:10 PM   #20
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like used in most other shock applications
nitrogen is used for high heat applications. there is no way forks approach those temps
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Old 11-27-05, 06:12 PM   #21
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nitrogen is used for high heat applications. there is no way forks approach those temps
I had heard that on long down hill trails air/oil shocks have been known to crap out......i live in florida so...
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Old 11-27-05, 06:14 PM   #22
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Nitrogen in tires always cracks me up. The Earth's atmosphere is 78% nitrogen. In order to get 100% nitrogen in a tire, you would also first have to remove any existing air in the tire. It's a waste of time.
no its not. of course there is residual air in tire, but you're still pressuring the system with a lot more of the "other" gas. if it troubles someone that much, you can pressurize it then bleed it out and fill again. that eliminate much of the air composition
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Old 11-27-05, 06:18 PM   #23
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I had heard that on long down hill trails air/oil shocks have been known to crap out......i live in florida so...
they might crap. they never get so hot that you cannot touch them.
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Old 11-27-05, 06:20 PM   #24
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they might crap. they never get so hot that you cannot touch them.
who cares what the actual temp is...if they crap at due to heat> the oil boiling...its hot enough...
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Old 11-27-05, 06:25 PM   #25
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who cares what the actual temp is...if they crap at due to heat> the oil boiling...its hot enough...
no...they won't get that hot
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