Quote:
Originally Posted by roflwaffle
If the rate of leakage of oxygen is significantly greater than nitrogen then after a few fills most people will end up at 95+% nitrogen anyway provided they don't let their tires drop more than a few PSI, and if they're letting their pressure drop more than a few PSI anyway they shouldn't be worrying about what they're putting in their tires.
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Okay - this is going directly into unicorn territory here. I very severely doubt that the tires themselves are somehow acting as oxygen sieves.