Nitrogen..., Where to get it. Options

[BMXerror]

Hey all. I was just wondering if there's any place to buy nitrogen for tires just with a tire chuck, or if I have to get one of those high pressure cylinders and regulate it down. That is all. Thanks. (IMG:style_emoticons/default/beerchug.gif)
Mark D.

[sww914]

I think if it's under so little pressure that you can haul it around in an aerosol can then there isn't enough in there to inflate a tire. I've asked for air at 2 different tire stores, one local and one Costco, they both gave me nitrogen, no charge.
I wouldn't bother, air is already 78% nitrogen but the nitrogen is dry so tire pressures don't fluctuate as much with temperature changes.

[BMXerror]

...but the nitrogen is dry so tire pressures don't fluctuate as much with temperature changes.

Well, that's the whole point. I started running SCCA Solo 2 this year, and the way they set up their runs, there's a lot of temperature fluctuation, and this makes pressures rather hard to control. I think it'd be less of a problem if I were road racing, where I would get my tires up to temperature and keep them there for a while. I read today that with "pure" nitrogen, your tire pressures should fluctuate approximately 2% for every 10 degrees of temperature change. I've observed about 6% with atmosphere. If it's free (or fairly cheap) I'll give it a shot and see if it's worth my trouble. Thanks for the tip guys. (IMG:style_emoticons/default/beerchug.gif)
Mark D.