Boston Driver

That would be for something much more fun that tire filler ))

Audi Escargot

All gases get smaller when the temp drops. That includes Nitrogen (which is 80% of our air) and Oxygem (which is most of the rest.)

Is there a factor with water vapor condensing to reduce volume? If so, then dry air would do just as well as nitrogen.

Of course, if you use helium, you lighten the tires, but they don't stay at full pressure long (remember birthday party balloons?)

michaelgvh

The neighborhood kids all huddled around Jim's car trying to suck the gas out of his tires.
Jim wakes up every morning to flat tires and giggling kids on his lawn.

iProDrive

LOL!

J-SIN 2.7T

Here in Chicago we've got plenty of places that will only fill your tire with nitrous. I've got a 1987 Lotus and the rear two tires have an amazing amount of dry rot and because i've got nitrous the air wont sneek out the little holes like normal air will. Definitly gonna help keep tire pressure at a normal amount better than air..

Grapeking

...nitrogen, not nitrous (big difference) ;-)

iProDrive

haha put some NOS in those tires! It will add 20 HP! hahaha :P

GPZ

"I like what tire pressure is not changing due to tempreture drop..."

Nitrogen acts more like an ideal gas than air does, and thus, changes in temperature change the pressure, see "Ideal Gas Law"

Folks, air is 78% nitrogen already! Do you really think replacing the 22% that isn't nitrogen is really going to make that big of a difference?

The only advantage is that it would preclude oxidation of the rubber and tire on the inside (No oxygen, no oxidation), HOWEVER, when is the last time you took a tire off and thought hmmm, my rim sure looks oxidized on the inside...(so what if it did! Doesn't impact the integrity of the rim or its appearance)...and tires are deteriorated mostly by UV and ozone (on the outside), not oxidation of the rubber.

Save your money folks.

Pete K (vegasguy)

The benefit is from the tire pressure remaining consistent with increased heat in the tire. The normal temps you see on the road are not enough to worry about.
Now on the track it really helps keep the tire presures more stabale. The advantage is that you do not need to guess at what tire pressures to start with as there should not be a 8 degree difference from start to finish.

I use air in my road tires, nitrogen in my track tires.

GPZ

Nitrogen (N2) has a lower molecular weight than oxygen or carbon dioxide, and therefore is also a smaller molecule, and therefore is MORE likely to escape or diffuse out of your tire.

PLUS, air is 78% nitrogen to begin with.