Doug33 wrote:
Regarding the nitrogen question, I regard this as a gimmick. Especially since "air" is 81% nitrogen to begin with.
A local place told a friend that aircraft used nitrogen in their tires, and if it wasn't better than regular air they wouldn't do it. What the guy didn't say was that nitrogen is used in aircraft tires because it doesn't support combustion if the tire starts on fire (aircraft land at high speeds, around 150+mph). So if you fear your car or trailer tires starting on fire, then its for you!
Steve