Re: spray or blow?
* 1% Water Vapor and Other Gases – Escapes up to 250 times faster than Nitrogen
* 21% Oxygen – Escapes 3-4 times faster than Nitrogen
* 78% Nitrogen – The largest molecule in
air, dry, non-flammable.
Because of their large size, nitrogen molecules are the least permeable and stay in your tire longer.
It's not about the nitrogen. It's about reducing oxygen, water vapor and other gases.
So...
This tells me I'm already running an increased percentage of nitrogen.
I mount up a new set of tires...
Fill them with 78% nitrogen, 21% Oxygen, and some other stuff.
The Oxygen is the first to leak out of the tire (leaving a higher percentage of nitrogen in the tire)
Top up with "air" again, and the percentage nitrogen is still higher than ambient.
Maybe we should grosley over inflate the tires with air in the first place, then wait till they leak down to the desired preasure, (with a higher percentage of nitrogen)
(Sorry, its late, I couldn't resist)