Say what you will about nitrogen, but I had my previous set of Toyo Proxes filled with it on installation and not even once in 3 years (40,000+ miles) did I ever have to fill or remove any nitrogen to keep the pressure levels accurate. They were literally filled on installation and never touched throughout the life of the tires because pressure remained constant for over 3 years. I can not say the same for any regular "air" filled tires I have ever owned. The pressures with notrogen were surprisingly constant over this time period. This alone makes it a much safer bet for anyone (especially SUV owners) who may not check their pressures as much as they should. It does have it's benefits, regardless of what many have to say, imo.

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Profeshenal spellar