Checking Spare tire Air

[yarrr]

Originally Posted by Yaris Hilton

It's false that nitrogen is denser than air. It's a little less dense. Gases' densities are directly proportional to their molecular weights. Air (dry) is approximately 78% nitrogen, around 21% oxygen, with various trace gases making up the rest. Oxygen's molecular weight is about 32, nitrogen's 28, so air with its oxygen content is a little denser than nitrogen. I doubt you could measure a significant difference in the leakage rate. Nitrogen's a current "snake oil" fad for the most part.

For the record, I run good ole regular air in my tires, but:

The idea behind nitrogen fills isn't about density, its about the size of the molecule, and a nitrogen molecule is bigger than an oxygen molecule. This supposedly helps individual molecules from seeping through the rubber.