True air is over 70% Nitrogen
Air also contains water and oxygen and these are what effect the internal thermal dymanics. If you could get dehydrated air that would be better than normal air.
Most servos do not dehydrate their air supply so you keep putting in more water which effects the thermal dynamics and can freeze in very cold climates.
Nitrogen keeps the tyre pressure better regulated than air, which means that your tyres should last longer (excluding boy racers doing donuts), handle better as they stay at the set pressure at the designed speed rating, have no problem in very cold or very hot conditions, and it only costs a few dollars per tyre.
Ideal for run flat tyres I should think.
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