Quote:
Originally Posted by Jordo
The only gain I think is real, is the Nitrogen does not expand or contract under hot and cold conditions... thus keeping your tire pressure the same under either condition... but that is a tiny gain for $30, IMO.
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That is ABSOLUTELY FALSE.
It has been repeated and believed like an internet rumor, but is just false.
Nitrogen, like air, obeys the ideal gas law. It cannot escape this reality:
PV=nRT
End of story. But the back story:
Uncontrolled fill in tires includes moisture. Although atmospheric gases follow the ideal gas law, MOISTURE does not and will create pressure variations as it heats.
When race cars, aircraft tires are filled with 99.99% pure technical nitrogen, care is taken to eliminate any moisture. Great.
Unfortunately this "moisture free' condition is not assured with commercial 94% pure nitrogen generators. They take a truth (race cars abd jets use 99.9% pure, moisture free nitrogen) and use just the nitrogen part (94% with limited moisture control) to convince people ALL the benefits will be included.
Even sillier are the claims of safety, tire life, never needing to check air pressure, etc...