The reason NASCAR uses nitrogen is the moisture in air will gain more
pressure as it heats up than dry. Period! No weight issues at all.
Radial tires are much more sensitive to pressure changes than bias
tires. It is along story and if you really want to know why, contact me
off list and I will try and splane it. Don't feel bad, Darrel Waltrip
never was able to understand the difference. Doug Odom in big ditch
Benn wrote:
>The moisture might well be an issue. But, by my calcs, dry air is only a
>weight penalty of less than an ounce vs nitrogen in a large truck tire.
>Benn
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