nitrogen instead of air?? Options

[JustinCapps]

so, i went to best buy today, looking around in the auto section, and notice that you can put nitrogen in your tires?

anybody hear about this?
i just thought it was odd.

says that, better for wear on tires, safer prevents leaks..wtf? haha

[blu94gt]

A few places have been doing this, and I've seen more and more tire shops and dealerships starting to. The idea behind it is nitrogen molecules are bigger and will leak slower, helping the tire to leak air more slowly. But when you think about it, air is 78-ish percent nitrogen already, so you're not really making a big difference. I tried it when the shop I worked at was pumping it, and didn't notice anything different, still had to air my tires up about once a month to proper pressure.

You can tell if a tire has nitrogen in it because the shop that fills it is supposed to switch the black valve caps with green ones.