Drag Slick question

Air is 78% Nitrogen to begin with, so we typically fill our tires with mostly Nitrogen already. For just about any automotive use, you'll never be able to detect a difference. Tire stores chirping up the fact that they inflate with Nitrogen is just marketing ballyhoo.

Aircraft tires are filled with Nitrogen for two reasons; lack of moisture, and convenience. A tire on a typical commercial aircraft spends quite a bit of time (sideways) in a really cold environment and then must accelerate to 100+ MPH instantly upon landing. Moisture that condensed out and froze would make for an imbalance that could interfere with the anti-skid system. And it's easier to roll a Nitrogen bottle out onto the line to top off tires/accumulators/struts than a HIPAC (high pressure air compressor).