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Tire Nitrogen In A Can??

NoVaGT

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Or something like that? PP car tires use nitrogen, and I'd love to have a can to top off, raise pressures when it get's cold, etc.

Anything other than the few tire places that have nitrogen?
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johnson.ba

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You shouldn't need to top off the nitrogen in your tires when its cold out, that's why you use nitrogen in the first place, it doesnt suffer the same expansion/contraction of atmospheric air.

Costco uses nitrogen in their tires, so check them out if you want to up your pressure. I believe they'll do it even if you don't buy tires from them.
 
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NoVaGT

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You shouldn't need to top off the nitrogen in your tires when its cold out, that's why you use nitrogen in the first place, it doesnt suffer the same expansion/contraction of atmospheric air.
Oh, you still have to adjust them. Not as much, not as often, but they do require adjustment.
 

local driver

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You shouldn't need to top off the nitrogen in your tires when its cold out, that's why you use nitrogen in the first place, it doesnt suffer the same expansion/contraction of atmospheric air.

Costco uses nitrogen in their tires, so check them out if you want to up your pressure. I believe they'll do it even if you don't buy tires from them.
All gas expands and contracts the same rate. Boyle's Law.
 

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Indylatenight

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Costco uses nitrogen in their tires, so check them out if you want to up your pressure. I believe they'll do it even if you don't buy tires from them.
Here in Indiana, Big-O Tires and the Tire Barn chains will top off nitrogen even if you didn't purchase the tire from them. Just an FYI.
 

hiccup

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Isn't about 80% of most air in air compressors nitrogen anyways. Whats to really gain from pure nitrogen?
 

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Isn't about 80% of most air in air compressors nitrogen anyways. Whats to really gain from pure nitrogen?
less moisture, and really nitrogen is such a yuppy gimmick they get us suckers on , ill just use air and not give in to the marketing brainwash
 

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local driver

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Isn't about 80% of most air in air compressors nitrogen anyways. Whats to really gain from pure nitrogen?
The gain is that there's (hopefully) no moisture in bottled nitrogen, so that condensation does not cause corrosion inside the wheel.

But the effect of that condensation on tire pressure is negligible.

At the high end, the air inside the tire would have to reach 212 deg F for the water to become gaseous and cause a spike in pressure. That doesn't happen in street driving conditions.

Anyway, the last time I bought a new car, I was offered a "package deal" with nitrogen because it would "keep my tire pressure light from going on".:doh:
 

ghostnote

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At the high end, the air inside the tire would have to reach 212 deg F for the water to become gaseous and cause a spike in pressure. That doesn't happen in street driving conditions.
Even higher. A tire is at 32 psi nominal, which means 32 psi over atmospheric - that is, 32+14.7 ~ 47psi. Water boils at about 280 degrees F at that pressure.

In any case, you're not right. Boiling isn't the only way water vapor exists. In other words, water does not need to reach boiling temperature to exert vapor pressure. Here's a primer on why, as applied to tires and water vapor. https://jalopnik.com/heres-the-deal-with-nitrogen-filled-tires-1795659391

The TL;DR is that 1) over time, static PSI will decrease about 1.6 times faster than nitrogen tires since oxygen molecules are smaller and penetrate rubber easier than N2 - but the opposite happens as well; 2) tires heat up while driving, which significantly increases water vapor pressure.

My TL;DR is that N2 fillups are strictly better than atmospheric, but only by very little. So if it's free, you should always select nitrogen. However, don't even think about paying extra for it.
 

local driver

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Even higher. A tire is at 32 psi nominal, which means 32 psi over atmospheric - that is, 32+14.7 ~ 47psi. Water boils at about 280 degrees F at that pressure.

In any case, you're not right. Boiling isn't the only way water vapor exists. In other words, water does not need to reach boiling temperature to exert vapor pressure. Here's a primer on why, as applied to tires and water vapor. https://jalopnik.com/heres-the-deal-with-nitrogen-filled-tires-1795659391

The TL;DR is that 1) over time, static PSI will decrease about 1.6 times faster than nitrogen tires since oxygen molecules are smaller and penetrate rubber easier than N2 - but the opposite happens as well; 2) tires heat up while driving, which significantly increases water vapor pressure.

My TL;DR is that N2 fillups are strictly better than atmospheric, but only by very little. So if it's free, you should always select nitrogen. However, don't even think about paying extra for it.
Great article at that link! Thanks.
 

TNcoupe

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I have a N2 tank that I bought from the local gas company that I used on my racing kart tires. Pretty inexpensive to buy and only $20 to refill. The regulator is the expensive part. Had it for 3 years and filled many kart tires and adjusted my Mustang tires many times and haven’t had to refill it yet.

And N2 does expand with heat, kart tires would be up 3psi from start to finish of a 10 lap oval race.
 

jasonstang

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No need. Over time only nitrogen in air will be in the tires if you put normal air in them as only nitrogen molecules will be too big to pass the holes in rubber.
So just keep filling up until pressure stabilizes. I think temperature will have more effect on pressure.
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