Nitrogen in Tires - Page 3 - Toyota Yaris Forums - Ultimate Yaris Enthusiast Site

10-17-2009, 08:37 AM

#37

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Quote:

Originally Posted by Kal-El

How about helium?

I don't know a whole lot about gases but that would certainly lighten things up. Maybe it wouldn't hold as well? Sorry if this sounds stupid.

I believe it's because Helium molecules are too small and thus they would lose pressure much faster than is practical.

See molecular diffusion.

Thicker molecules like Nitrogen and Oxygen can't escape the tire as easily so they're used instead of Helium.

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