This was in the paper's executive summary:
The result of oxygen permeation is generally considered to be oxidative degradation, or aging, of the rubber materials that make up the tire.
The effect of nitrogen inflation gas is shown to forestall the increase of oxygen concentration through the tire for about four years.
Bottom line, if you need the insides of tires to not start aging before 4 years of use, nitrogen fill may be helpful for you. If you wear off the tread before 6 years nitrogen is of little benefit.
Scientific illiteracy leads to one falling for media hype, marketing spin, and internet myths. Perhaps society should make the effort to read these types of articles.
