puckgrinder85
Platinum Member
I don't see anywhere where it says oxygen is larger than nitrogen, the difference is small but nitrogen is still larger. I believe nitrogen is also less dense and is suppose to help with rolling resistance, they even make tires geared for lower rolling resistance. Again, all this crap might make a difference when you put on a million miles but I don't forsee it being any better than just checking your tires periodically. **** if your passenger vehicle was built after 07 you have TPMS and it will even tell you when your tire pressure is a little bit below the threshold the manufacturer sets due to government mandation.