Re: Nitrogen in the tires
Personally I run dihydrogen monoxide in the tires, it keeps the center of gravity low.
Call up your local welding supply shop. You should be able to get a big tank of nitrogen for around 250$, with a 25$ fill. The regulator will cost maybe 60 bucks, add another 20 for hose and chuck and you're set.
Realistically it's not worth it unless you have another use for the nitrogen, like brewing your own beer, or rebuilding your own shocks. You're already using, what, 78% nitrogen anyway, right? Just don't run low air pressure in your Firestones on your Ford Explorer, and you'll be fine.
-Sean
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