FrankShore wrote:
The molecule of Nitrogen is larger than that of oxygen, thus the nitrogen will not leak out as early or as often.
To the people who say: Gimmick, these are basic facts, the nitrogen leaks out much slower due to it being a larger molecule
Again, the testing I've seen, or was part of showed less than 3psi difference after a year on high pressure tires over 200psi, consumer reports testing on tires inflated to 30 psi showed a difference of 1.3 psi comparing tires inflated to with air as compared to purged and strictly nitrogen filled tires after a time period of 1 year. I wouldn't call that much slower as it's such a slight difference you need a large sample size and tightly controlled temperature and measuring equipment to even see it. I get a lot more pressure variation than that just from the normal temperature variation over the course of a day. Being as how I re-set my tire pressure several times over the course of the year based on temperature changes, and sometimes location/altitude changes I can't see where any benefit could be realized. I'll stick with my vote for gimmick.
