As Dalemac said very little difference between air and nitrogen. Rubber in its self is a pourus material, therefore air under pressure will find its way out, nitrogen being just a little denser than air dosent find its way out quite as quickly. However when you do lose nitrogenpressure re-filling with compressed air will not harm anything.It's a good sales point but not much more than that. For some fun ask an RV salesman what to do when nitrogen filled tires get low on pressure, most of them don't have a clue and can be very creative in their answers.
Flyone
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F250-7.3 L, 2012 305SK--Happy Wife, Good Life
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