Originally Posted by Scorer75
The bigger impact on bikes, as per a recent article I read would be that Nitrogen molecules are bigger than Air so you would lose less air and not have to fill your tires as often.
Also, the $2 - $5 per tire includes free refills.
Setting aside that N2 is already 70% of air, its molecules are actually smaller than what is most of the rest (O2 and CO2). Free refills are cool, though. As long as you don't have too many flats, I guess, to soil your tubes w/ plain old atmospheric stuff.