Nitrogen in Tyres (Tires)

Jammernet

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Thinking of replacing air with Nitrogen in my tyres (UK spelling).

Some reports say it's not worth it but it will only cost 10 GBP.

Anyone have any experience? I'm looking to keep pressure more consistent from cold to hot.
 

2kflhr

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Everything I own that has inflatable tires is charged with N2. It seems to have less pressure loss over time due to larger molecules. It is dry with no moisture so resist corrosion of the wheels. Nitrogen is cheap... a 300 cubic feet cylinder charged to 2500 psig is only about $6 and can fill multiple tires.
 

Hahns52

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I'll always think of it as a gimmick, they're already filled with ~78% nitrogen...
 

doubledge

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The two main things that I am aware of is that it does not change pressure with temperature changes as much as air and it doesn't have moisture. If you have aluminum wheels and drive you car an average amount to get new tires in a typical time period this doesn't mean anything. The pressure thing is to each their own. I don't bother with it.
 

infiniti

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One other consideration is whether you'll have nitrogen readily available to top them off. Otherwise, you'll be diluting them with each top off and introducing moisture. I've never had trouble with regular air fill ups.
 

poolmon

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I'll always think of it as a gimmick, they're already filled with ~78% nitrogen...
I think the same way.

Nitrogen is generally used in aviation tire applications since they constantly go from warm sea level to frigid high altitudes and thus constant freeze thaw cycles that can affect any latent moisture in the tires if air were used vs dry nitrogen. Also, its a safer to have high pressure nitrogen in an aircraft tire (especially when stored in an wheel well) since it's non-combustible vs air. Most aircraft tires violently spin up from zero to over 150 mph when landing with extreme breaking immediately applied. A lot of heat is instantly generated causing the brake discs to glow cherry red and any burst nitrogen filled tire is a lot safer than a burst air filled tire which has 21% oxygen. As I best recall FAA generally requires heavy aircraft (75,00 lbs) to have nitrogen on any braked wheels. Also tire pressures in aircraft can range 200 to 300 psi vs 35 psi for most cars

If I had a heavily braked NASCAR vehicle I would use nitrogen, but in a passenger car the advantage seems much diminished. Just my HO.
 
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Jammernet

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One other consideration is whether you'll have nitrogen readily available to top them off. Otherwise, you'll be diluting them with each top off and introducing moisture. I've never had trouble with regular air fill ups.
That was my main concern. If it's as good as the claims then the pressure will not drop due to gas loss or temperature so they should not need to be topped up so often.

I guess I'll try it, if it works then it works. If I have to keep topping up then it will be back to air in time.
 

infiniti

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That was my main concern. If it's as good as the claims then the pressure will not drop due to gas loss or temperature so they should not need to be topped up so often.

I guess I'll try it, if it works then it works. If I have to keep topping up then it will be back to air in time.
I've had Nitrogen before (I think it was more popular about 20 years ago) and it performed similar to regular air...maybe a small improvement, but I definitely had to top it off as the weather changed.
 

Jammernet

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I've had Nitrogen before (I think it was more popular about 20 years ago) and it performed similar to regular air...maybe a small improvement, but I definitely had to top it off as the weather changed.
Thanks for that info, if it's just hype and is not going to keep the pressure stable then I may just give it a swerve and save some cash.
 

infiniti

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Thanks for that info, if it's just hype and is not going to keep the pressure stable then I may just give it a swerve and save some cash.
I would not pay even a dollar for it given my past experience with it.
 

Kennyc56

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I work at a tire store as an alignment tech, have for 30+ years. This is a running joke for us! Like a couple of you guys said, "regular" air is already 78% nitrogen so damn the difference! That being said a lot of people insist on it! I have access to it and can get all of it I want for free. Guess what I have in all my tires? I'll give you a hint, It ain't nitrogen! Nascar teams that are trying to control their tire pressures to within 1/4 of a pound are the only reason that I can see for it, but to each his own!
 

wjbertrand

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I use and am a fan of using 78% nitrogen in my tires - it’s free too. I don’t change the blinker fluid either.


Sent from my iPhone using Tapatalk Pro
 

JayDog

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Only time I used Nitrogen was when I worked at a gas supplier many years ago as we always had a tank of Nitrogen in the corner with a line on it so free to use.
 

GotWake

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I work at a tire store as an alignment tech, have for 30+ years. This is a running joke for us! Like a couple of you guys said, "regular" air is already 78% nitrogen so damn the difference! That being said a lot of people insist on it! I have access to it and can get all of it I want for free. Guess what I have in all my tires? I'll give you a hint, It ain't nitrogen! Nascar teams that are trying to control their tire pressures to within 1/4 of a pound are the only reason that I can see for it, but to each his own!
Yeah and I wonder what percent of nitrogen do they actually achieve in most shops. Popping on a tire and already has air in taking up space and then pumping in nitrogen isn't going to be that much higher. I bet it's not much above 85 percent. And the BS about not adding to your tires as often is complete BS. I bought a new vehicle and they had nitrogen in the tires. Guess what I had to do in the fall when the temperatures dropped 25 degrees...... put freaking air in my tires.
 

doubledge

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Not true. Gay-Lussac's Law applies to all gasses.
For sure but you forget about the water in the air which results in a greater pressure change with air. This is why race car teams prefer nitrogen.

 

WGSNewnan

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unless you put your tires under vacuum before replacing with nitrogen you are only diluting it to begin with.
i drove an asphalt car for years and tried darn near everything. ultimately we bought a vacuum and built our own air dryers and it worked just as well.
 

doubledge

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Another reason not to get sucked into the hype. No shop or dealership is going to fuss with a vacuum. I have my doubts that many would actually follow the recommended fill and bleed several times procedure.
 

CPB

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Thinking of replacing air with Nitrogen in my tyres (UK spelling).

Some reports say it's not worth it but it will only cost 10 GBP.

Anyone have any experience? I'm looking to keep pressure more consistent from cold to hot.
How much do you currently pay attention to tire pressures as they warm? What PSI range do you try to keep the tire in when driving?

If you don't have answers to both of these, then nitrogen is probably a waste of your time and money. If you obsess over these things and want to eliminate some variance, then it will help.
 

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