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John Goreham    December 28, 2016 - 5:29PM

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Glad to see any story that debunks the nitrogen scam. PV=nRT and P1V1/T1 = P2V2/T2 does not care if tires contain 77% nitrogen or 99% nitrogen. When temps drop, tire pressure will decline. As tire temperatures increase due to ambient air changes or normal driving friction, the pressure in a tire will go up. In actual practice, it is about 1 psi for every 10 degrees F temperature change. There is no science to support any claim that nitrogen is more "temperature stable" than clean dry air in a tire.

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