3 Months? That's a question you need to find yourself. Couple of times when I tried N2, it wasn't the case and no different from normal compressed air. I noticed a drop of 1 - 2 PSI every week.
Thx Figoian for the response, will check it this weekend and tell you the results
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. But in my experience with punctures, there is no difference between N2 and normal air. Once on my drive to kancheepuram, a nail had lodged firmly in to the front left tyre and I did not feel any pressure loss. My cousin accidentally discovered it when I was backing up from a pit stop
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and I could comfortably reach a punture shop 10-12 kms away without much trouble. In fat there was no loss of pressure and it showed 31 PSI (I keep 32) when the mechanic released the pressure. So tubeless saved the day for me
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and the reason for no loss of pressure was the nail was flatly lodged in to the tyre. So I agree with the reasoning that loss of pressure depends on the way the puncture has happened.