I AM CALLING BS TO NITROGEN FILLED TIRES!!!

[chief38]

Not sure how, I've never had to pay extra for nitrogen.

I wouldn't either - it's free from Costco when you buy tires there and the Dealer of the new car also fills them off for free. That said, I have a large air compressor right in my own garage that I will be using anytime they need to be topped off. Not worth the effort to go for the Nitrogen.

 

[Jeff423]

I'm surprised this is still a "thing". I remember the Car Talk guys laughing about this 7-10 yrs. ago.

 

[SMSgt]

The AF aircraft I worked on used nitrogen because it is very dry and has no oxygen. No moisture nor O2 means no corrosion inside the components. Corrosion in high-pressure hydraulic accumulators and wheels can be a very bad thing. Even the periscopic sextants I repaired were nitrogen filled to prevent internal fogging/icing when shoved up through the sextant port for shooting stars. Every servicing chart has a temperature correction scale for the pressure to be serviced. Yes, nitrogen still expands and contracts with temperature changes.

 

[DUSTYDOGDAN]

Tires heat up when you drive... 4 or 5 psi is normal From a cold tire sitting in the garage over night.
This system helps when it goes from winter to summer.
Every time summer I would have.to let some air out because I had filled them in the winter when it was really cold.

 

[Telecaster]

All gases expand and contract the same with temperature. Boyle's Law. They lied to you. But nitrogen MAY be less conducive to corrosion of metal inside. But I wouldn't worry about it.

 

[Telecaster]

However, since the atmosphere is 78% nitrogen, they probably "feel" like it's true. But they're still full of it.

 

[grover99]

Total scam. When I was shopping for a new Kia there were two dealers that I could buy from. One dealer had in its fine print that all tires were filled with nitrogen at an extra charge. I went with the other dealer. Several years ago I had a car that nitrogen filled tires. Seemed that I needed to add more nitrogen a lot and the only place that did that was 50 mikes away.

 

[glenwolde]

It does seem to be more useful in cold weather.

 

[oldbrownhat]

To each their own, but sounds like BsO² to me.

 

[Rustyt1953]

 

[444 Magnum]

Funny, but this joke assumes the teacher READ the answer.

 

[Breakaway500]

I once had a woman in a Volvo come in the shop with a low tire. She insisted that I only put nitrogen in it! Oh boy. I told her the best I could do was 80% nitrogen and she said that will do.

I don't see many using pure nitrogen at the track. Some serious teams do..but that's about it. Every little conceived trick is tried...regardless if it can be measured or not in the long run.

Most of the expansion is due to moisture in the air, 80% or 100% nitrogen.

Lots of silly things people pay for at the dealerships..nitrogen in tires, magic ceramic "coating" on the interior and exterior...locking lug nuts you pay 10X what they cost at the parts store. It's a crazy world..

 

[Bald1]

Chief, when you say you see know difference do you know that regular compressor filled tires also rose to the same 39/40 psi? Or are you just saying they rose 4-5 lbs it can't be much different than air.

 

[Bald1]

Chief, when you say you see know difference do you know that regular compressor filled tires also rose to the same 39/40 psi? Or are you just saying they rose 4-5 lbs it can't be much different than air.

 

[DWalt]

PV=nkT whether it's air, or nitrogen.

It's PV=znrt for gasses. z is called the compressibility factor. For "ideal" gasses, z=1, and can be ignored, but for low temperatures and at high pressures, the gas molecules get "stickier" and do not behave quite like ideal gasses. Also, different gasses will have different z values depending on the gas molecules. None of that makes a great deal of difference for tires as at the moderate temperatures and pressures inside a typical tire, the z values for nitrogen and for air are fairly close to 1. At one time one of my jobs was designing very high pressure and low temperature nitrogen pumping equipment, and z did have to be taken into consideration in the design calculations. The point is, that inside a tire, whether it is filled with air or nitrogen makes very little difference regarding pressure changes during use.

I think the Firestone store down the street from me charges $35 for a nitrogen tire fill. Or did. Has been several years since I have been there.

Are Nitrogen-Filled Tires Worth the Cost? - Les Schwab

 

[Retired W4]

In my youth I tried nitrogen gas in my tires and they sang down the highway.

I also tried nitrous oxide but they just laughed.

I wondered why all those Whippet bottles were laying around.

 

[Rustyt1953]

I wondered why all those Whippet bottles were laying around.

I also tried amyl nitrate but my tires kept going flat.

 

[Retired W4]

Maybe it makes a bigger difference when ambient temperature hits -40ºF at 36,000+ altitude but here on the ground I see no difference what so ever! More than likely - a marketing thing.

That's -40 degrees centigrade! Oh wait, it's the same. Regardless, that's cold

BTW, the tires on the Lockheed JetStar II I flew were inflated to 220 PSI. I don't know what it went down to at 39,000 feet, -40 degrees.

 

[Mike SC Hunter]

MORE BS to rob your wallet.

 

[LVSteve]

One of the theories was that dry nitrogen varied less with changing temperature than compressed air that came with all kinds of moisture. Makes me think that fitting an air dryer on a normal airline would have a similar effect.