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Air is 72% Nitrogen. There is no good reason to use pure Nitrogen for tires. Sure there are reasons, just none of them are good enough to justify the cost/hassle.
1) Nitrogen does not expand as much as it is heated as air which results in more even tire pressures but to such a small degree as to not matter (1 - 2 psi)
2) Nitrogen does not oxidize tire insides as much as air. True, but the cost of N2 fills is greater than the increased tire longevity.
3) Its terminally tech-cool. True, you got me there :-)
4) Nitrogen tire fills are a great profit maker for tire shops and dealerships interested in wallet lightening of the clientele. True, you got me there :-)
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