[EriktheAwful]

If you autocross or track race regularly, it's worth it to fill your tires with nitrogen (although $39 is a ripoff). Your tire pressures will be more constant because nitrogen has a lower rate of expansion than ambient air. I have access to a nitrogen generating machine at work and have been contemplating filling my tires for quite a while, but just haven't done it.

Military aircraft tires and landing gear struts are filled with nitrogen, although (depending on the aircraft) they can use compressed air in a pinch. The other main advantage is that removing oxygen prevents corrosion, which on military aircraft means fewer inspections.

[Colt 45]

Originally Posted by Brent05redfire

this is straight from HowStuffWorks "How NASCAR Race Cars Work"

Nitrogen Instead of Air
Most of the teams remove the air from the tires and replace it with nitrogen. Compressed nitrogen contains less moisture than compressed air. When the tire heats up, moisture in the tire vaporizes and expands, causing the pressure inside the tire to increase. Even small changes in tire pressure can noticeably affect the handling of the car. By using nitrogen instead of air, the teams have more control over how much the pressure will increase when the tires heat up.

NASCAR tires heat up a heckuva lot more than our radials.

Yea,That's what I was trying to say.If their tires changes circumference 1/8"it's unacceptable,things have sure changed since the early days of stock car racing.Think I'll just stick to reg.old air.Thanks,Have a good one.

[RegencyGT]

Well I'm going to start using helium, should offset the unsprung weight of my 20 inch rims, I'll hook anyone else up too for $38.95!

[ironmike666]

Originally Posted by RegencyGT

Well I'm going to start using helium, should offset the unsprung weight of my 20 inch rims, I'll hook anyone else up too for $38.95!

Great idea!!! I wonder how much lighter it will make your car. You better charge more than that though....sounds like the next big seller. The more you charge the more people will wanna use it. You could do the spare tire for 10.oo extra. hahahahaha

[Taxpayer]

No kidding? I never heard of this.

[hotshot]

Any kind of small jet and up uses Nitrogen in their tires. They are also filled anywhere from 100 psi to 160+. They also experience temperatures far below freezing while at extreme altitudes. So i say its better for the cold. My father's tires have "leaked" air every week this winter. His Continental tires leak like an old faucet. The freeking TPMS button goes off everytime i move his truck into the driveway at night.

[duckbubbles]

Originally Posted by stlwagon

If it were free, I'd say go for it. Not something I'd be willing to pay for.

I thought about it today and filled my tires with nitrogen at work for free. Just 'cause I can. I don't expect to see any benefit except MAYBE slower leak rate.

One instance where it could pay off is in the spare tire, if you have one. Maybe a slower leak rate. Now, tell the truth- When was the last time you checked the pressure in your spare?

Frank