junkyardjohn
Well-known member
Pros / cons of use of nitrogen in run flat c6 tires. Do they sell a nitrogen compressor? Or is it a storage tank that gets filled when needed.
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They went on to say how nitrogen had larger molecules then air which would prevent any air seeping out from the rim.
If you are wondering if a car has nitrogen in the tire, look at the valve caps, they are usually green. Barrett
They look stupid and I'm going to swap them for the original caps this week as I'm taking the "V" to a shows Saturday and I don't want the green caps on it then.
This another angle of the scam/myth. If the nitrogen molecules were larger and therefore didn't escape, a tire filled with 'regular air' would eventually become filled with pure nitrogen all on it's own. The tire walls would act like a filter and let only oxygen molecules through.
Funny how the scam artists don't have answers for this and the other points above.
Nitrogen, found on the periodic table of the elements is number 7, Oxygen is number 8. (Nitrogen weighs less!!) The Nitrogen atom is 155 picometers (pm) in diameter, the Oxygen atom is 152 pm in diameter. Nitrogen is a larger atom by 3 picometers or 0.000000000003 meters. To have nitrogen gas, the molecule is made up of two nitrogen atoms (N2). Oxygen is similar (O2). All this means that yes, if we are discussing absolutes and picometers...N2 is a larger molecule (by 6 pm). A similar nearly identical relationship exists for specific heat capacity and density therefore, the N2 response to temperature changes in the tire will be very, very close to that of O2. At least so close that you will not be able to tell the difference with even a digital tire gauge!!
Another interesting fact is that, the air all around us (normally compressed into an air tank for tires!!) is composed of 78.08% real, honest to goodness, Nitrogen (N2). Interestingly, 20.9% of the all natural (depending upon where you live!!) air around us is oxygen (O2). The remaining 1.02% is made up of others like argon, carbon dioxide (we breath out and plants breath in!!) Typically, the average 1% moisture content in air won't do much toward accelerating oxidation since most wheels these days are no longer made of iron. Aluminum, Magnesium, Stainless Steel and Chrome don't really oxidize like good 'ole iron!!
Yup. When I asked why, they recited all the points mentioned in this thread.Isn't nitrogen Costco's standard fill?
As a luddite who still drinks his water from the 'tap' and not out of a (environmentally unfriendly) plastic bottle, I have to believe that the nitrogen tire fillers are related to the bottled water marketers. :L
It's good to see that most (if not all) of the posters here recognize this blatant trickery.
Personally, I plan to put helium in my tires to make my car lighter and therefore faster and more fuel efficient! A side benefit is the molecules are smaller and make less noise as they bang around insider the tire, contributing to a quieter ride.