bevo_87

are most of you putting nitrogen in tires instead of air? What are the benefits and do you do it yourself or dealer? What is the process to get it done right? I just heard that nitrogen supposedly gets you more life of tires but not sure if it is bs. Thanks

Glen e

Nitrogen is dealer scam for what you pay..just say no...

BeaZt

http://www.popularmechanics.com/_mob...stions/4302788. But I have no problem with using plain air.

b4i4getit

The air in your tires now is 78% nitrogen. No real advantage for most of us to use pure nitrogen but if your dealer is putting it in at no extra charge just leave it.

-CM-

There are countless threads already existing on the controversial subject. I am convinced that all new threads started about it are troll posts.

1986C4Z51

If you were racing and had extra money in your budget, sure. If you're worried about the life of your tires, protect them from the sun.

sweetcharity

Here is the benefit...it is dry, air is not. It does not heat up and expand as humid air does in your tire thereby increasing the pressure as temps rise giving you more stable and consistant tire pressures. It should be provided free at your dealership...if not, I would never pay for it!!

michaelinmech

I use 100% helium - reduces the un-sprung weight

HummelS

Our "air" is mostly nitrogen. I don't get the hype.

BeaZt

You're riding high!

Zymurgy

If they do it free, fine. Otherwise don't bother. Our Cadillac dealer (wife's SRX) provides Nitrogen fill at no charge.

fdxpilot

Two questions:

1: Short of mounting your tires in a vacuum chamber, how does the dealer or service garage get the air that was in the tire when installed out?

2: how does nitrogen repeal the ideal gas law which says given a constant volume (the interior of a mounted tire/wheel combo) as temperature increases, so does pressure? I know the nitrogen in accumulators on my airplane vary in pressure as temperature changes. The specs call for a certain pressure at a nominal temperature (usually 70 F) and then give a +/- for different temps.

Racer X

The problem with Helium is that you have to refill more often. Helium has a higher migration rate through the tire than nitrogen or oxygen.

Larry/car

Nitrogen is used in aircraft tires because it is dry and moisture will not condense as the aircraft climbs into the colder air. In severe cases this condensation could collect and freeze causing the tire to be out of balance on landing. Imagine a tire out of balance at 130 knots.

ByByBMW

Sweetcharity is trying, he just doesn't understand the physics.

RandomTask

Earths atmosphere is ~78% Nitrogren. . . just saying. . .

C7pimp

michaelinmech

^ And I thought I was having to refill often because of folks always inhaling the helium out of my valve stems at parties . . . . . .

MitchAlsup

Fill, empty with strap around tire, fill, empty will strap around tire, fill.

The water vapor in the air you pumped into your tires does not expand like the ideal gas law indicates. As you tires go from 160dF to 200dF, instead of getting a 2 PSI increase, you can get as much as 4 PSI increase from th added pressure of water climging to the rubber and wheel begoming a gas at temp.

Look up the vapor pressure of water from Wikipedeia.

robvuk

Nitrogen is used in aircraft because it is not flammable. They could just as easily dehydrate regular air if you think moisture is the problem. The Ideal Gas Law still applies.

Now if you're putting water in the tire and the temperatures reach boiling point, that's a different story. But the boiling point of water in a pressurized tire is far greater than 212dF

http://www.csun.edu/~jeloranta/CHEM351/example2.pdf

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