Granted, for your normal passenger vehicle, nitrogen would seem overkill. But pure nitrogen in your tires will help to keep your TPM light from coming on every time the temp drops dramatically (such as in certain climates). But the savvy physicists who race cars, or fly airplanes, will certainly opt for nitrogen over air in their tires. Not to mention that your “air”, while mostly nitrogen, oftentimes will also come with moisture included. If they were to use compressed air, like from your garden variety air-compressor to inflate a football, would it be possible for the additional moisture to settle and freeze, while the ball sat on the sidelines, thus creating a wobble?
“. But pure nitrogen in your tires will help to keep your TPM light from coming on every time the temp drops dramatically (such as in certain climates). “
Pure marketing hype.
“But the savvy physicists who race cars, or fly airplanes, will certainly opt for nitrogen over air in their tires.”
Planes use N2 or H2 because it eliminates the oxygen reducing fire hazards.
“Not to mention that your “air”, while mostly nitrogen, oftentimes will also come with moisture included.”
Any decent dryer on the compressor will render this point meaningless for normal applications.