Is there an advantage to nitrogen-inflated tires compared to air-filled tires?
We’ve looked into this before and have come to the conclusion that filling your tires with nitrogen instead of regular air doesn’t offer a substantial advantage for a street-driven car. The commonly held theory is that nitrogen molecules are fatter than traditional air molecules and resist seeping through tires quickly, which maintains pressure for longer. This may be effective on racecars or commercial vehicles, but if you regularly check your street car’s tires like you’re supposed to, you shouldn’t have to worry about the tires losing air. Also, regular checks give you a chance to inspect for nails, staples or metal fragments that may be dangling out of your tire.
The one advantage we do see, however, is the cool green valve stem caps that designate that the tires are nitrogen-filled. We like green.
CarTalk also tackled this question, found here.
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