Clathrate

Basic chemistry (Graham's law) says that the rate at which gases diffuse is inversely proportional to the square root of their densities. So since the density of a gas (at a given temp and pressure) is proportional to molar mass, and since air has a higher moleculas mass than nitrogen, so it should leak slower, if anything!!! (i.e. less massive gases diffuse more rapidly than more massive gases).

Very pure and very dry nitrogen (the stuff you don't get at Costco) might have benefits in race cars going 200 mph, but it pointless in passenger cars. Also, race cars like to use nitrogen for the added benefit that it won't contribute to a fire should the car catch on fire.

S4CFI

since nitrogen is dry and has no water vapor in it.

Total waste on the street.

Swank4

Atomic number of O is 16 and it leaks, according to the post. Something is not consistent.

Oo.et.oO

you fill your tires with oxygen? kaboom! yeah, the article is inconsistent

Oo.et.oO

more likely to leak through valve stems and at bead anyway (nitrogen or air)

SmokinS4™

but, it is agreed that it's the water vapor that is the enemy (expanding)

DUSTN

But that's because it doesn't expand at altitude like compressed air does (so it won't pop the tires). I'm not sure how it would react at temperature changes.