
Originally Posted by
noobi
It does so...
Does not...

Originally Posted by
SixPackBack
Fill a tyre with Helium and see how impermeable rubber is......only have to look at Helium filled balloons to see how well it contains light gas [yes some helium will leek out of the seal, but if you did a back-to-back test with air filled balloons the result speaks for itself.............rubber is permeable [but contains Nitrogen pretty well]].
Looking at Nitrogen, Oxygen and air:
Nitrogen:
Density - 1.165 kg/m^3
Atomic weight - 14.0067 U
Oxygen:
Density - 1.331 kg/m^3
Atomic weight - 15.9994 U
Air(78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide):
Density - 1.205 kg/m^3
References:
http://www.engineeringtoolbox.com/ga...ity-d_158.html
http://www.webelements.com/
So let's put an end to this non-sense that nitrogen is more dense than air and oxygen. It isn't.
What I do not know, can not easily find and can't be arse calculating is the molecular cross-section of the two molecules, this matters when considering diffusion through permeable media.
Yes, using a purified and completely dry gas could make a difference in regards to consistency - something which is very important in all scientific pursuits (e.g. F1). Also, I can not imagine any downsides to putting pute nitrogen (not liquid mind) in tyres compared to normal air. Worth $5 a tyre? I don't think so...

Originally Posted by
Devil
Any of the "non-believers".
I think this strikes closer to the heart of the matter. For everyday motoring the belief-factor of having nitrogen filled tyres is probably a few orders of magnitude more influential than the physical side of things.
It is preferential to refrain from the utilisation of grandiose verbiage in the circumstance that your intellectualisation can be expressed using comparatively simplistic lexicological entities. (...such as the word fuck.)
Remember your humanity, and forget the rest. - Joseph Rotblat
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