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Nitrogen Discussion

D

David G

Well-known Member
I would think that a tire would slowly gain nitrogen as you added air to it. The nitrogen molecule is bigger, so should leak out less.

Comments welcome.
 
(quoted from post at 17:31:11 03/05/14) I would think that a tire would slowly gain nitrogen as you added air to it. The nitrogen molecule is bigger, so should leak out less.

Comments welcome.
Click to expand...
've only heard N molecule is bigger, but never saw one beside another of those molecules contained in air. Are they solid or squeezable? Could I push a big one through a smaller hole?
 
ONLY if your leaks are bigger than an oxygen molecule and smaller than a nitrogen molecule.

That's asking a lot.

Otherwise either none will leak, or it'll all leak.
 
(quoted from post at 13:00:58 03/05/14) ONLY if your leaks are bigger than an oxygen molecule and smaller than a nitrogen molecule.

That's asking a lot.

Otherwise either none will leak, or it'll all leak.
Click to expand...

And there ARE permeable membranes used to separate nitrogen and oxygen from air. So in theory, small holes in tires could do it too - but you'd have to have a really ideal situation to make a noticeable loss of oxygen over nitrogen.
 
The air in our atmosphere is already 78% nitrogen. So that would mean that when you fill a tire with compressed air, 78% of that should already be nitrogen.

Now, your experience may be different than mine...but when my tires go flat, they don't just lose the 22% that's oxygen and other gases; they lose the nitrogen, too.

So based upon my experience, inflating your tires with "pure" nitrogen--and paying a premium for the privilege to do so--just doesn't pencil out...unless you're the one SELLING the "pure" nitrogen.
 
Interesting thought

Nitrogen is an inert gas and expends/contracts less than air - so you end up with a more constant pressure.
 
The theory makes sense, but isn't the benefit of nitrogen that not only is it stable and a larger molecule, but it's dry?

Where does the moisture fall into this theory? Will it and the other undesirable gasses permeate out or will they concentrate?
 
Gasses expand / contract the same, air without moisture should behave the same as pure nitrogen.
 
Bill, You have to wait to when the clocks spring forward, then you change the air in your tires to spring air, unless your compressor is still full of summer air. I've been running winter air in my tires, it weighs more. I get better traction. Spring air gets better mileage.
George
 
Moisture only causes a problem in race tires. The brakes on the race cars glow red, the rims get very hot. When the tire heats up, the water will change to steam, increasing air pressure more than dry air would. Nitrogen gives them better control of hot tire air pressure.
 
Only the gasses on the right side of the perodic table are inert, meaning they can't chemically react with anything. There are many nitrogen compounds.
 
I need to go somewhere and get a tank of pure clean air. Our air is so poluted around here it sours inside and rots tires. Better take a whiff of yours,you may need to change more often than you think.
 
Summer air, spring, winter- its all so confusing. Seems like most of what I'm seeing here is HOT air.
 
Actually, I don't add or change the air to my tires. I bought my tires from the tire barn. They filled them with NITROGEN. I get my tires balanced and rotated every 5K as part of the $50 I spent for life time mounting, balancing, road hazard and rotating. They check the air pressure. I'm not blowing hot air, I seriously have Nitrogen in my tires.

That doesn't change my opinion that Nitrogen in tires is a JOKE.
 
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