The primary advantage to using compressed Nitrogen is that the molecules are larger and do not permiate through the rubber sidewalls as easily as compressed air. Compressed air will leak out of tires are rate of about 2 PSI per month, With Nitrogen, that may take a year or more to loose 2 PSI.
As for moisture causing wheel corrosion, I find that questionable? The moisture only causes rust or corrosion in the presents of oxygen. Compressed air contains oxygen and perhaps moisture (moisture can be filtered out) while nitrogen does not have either. But is this a serious problem for most passenger cars or pickup trucks???? I think not.
Nitrogen was used on airplane tires for years because it maintained pressure for longer periods of time, and perhaps reduces corrosion of the aluminum wheels. And yes, aluminum aircraft wheels are expensive....very expensive...probably one full size passenger jet wheel may cost as much as as set of more expensive custom wheels do for a car, perhaps even several cars. Also, the FAA is very stict on aircraft standards and corrosion that would be insignificant on a passenger car, would require replacement on an aircraft.
That is one of the reasons I don't feel using nitrogen in car tires is worth the expense.
I think Caymen uses nitrogen in several of his vehicles and his fathers Motorhome/RV I do then that it is worthwhile to use nitrogen in RV's, Buses, 18 wheelers and other large commercial vehicles.
...Rich
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