Interesting and not surprising. I'll stick with helium to make my bike and truck lighter. :thumbup

 

given the care and attention that F1 teams take with filling their tires, your car mechanic comes nowhere close. the profit your shop makes off of nitrogen is astounding, though. it is a money-making gimmick.

 

We make close to 150$ profit on it every single car, our machine is outdated and maybe at best gives 80% nitrogen :hammer

 

Been saying it is worthless for years for the average person or even average racer who doesn't have f1 equipment

 

 

When i lived in Germany, i fell into the hype......

Who here uses nitrogen in their bike tires?

btw, the last thing he said, "If you are not checking your tires regulary, you shouldn't be on the road..."

 

fwiw, i can get 99.999% certified pure nitrogen (with < 1 ppm H20 and < 1 PPM 02) at cost plus 10% from work, and i don't bother. you would not believe how miniscule cost plus 10% is either. i think a lot of guys here would shit themselves.

 

The pressures that I know to run on Dunlop race tires are for use with air, so I'd have to relearn that whole process of hot/cold pressures and how/if they applied differently to nitrogen and what temp pressure the tires would work optimally at since normally we run them at a pressure that accounts for heat/pressure increases.

 

We use nitrogen in BlackHawks...we also have a machine that pulls nitrogen outta the air, some guys used that in their tires..

 

Nitrogen works, I haven't filled my tires since I bought my car new in July and the tire pressure warning has only come on when it's been really cold - however, I will definitely not waste money on having it refilled if/when it's needed. If it is indeed pure nitrogen from the factory, filling in a few PSI worth of atmospheric air will still keep the nitrogen content higher than the bullshit workshop machines and it's only a buck at the local gas station.

 

That's the only real benefit I have heard of, tire pressure doesn't seem to fluctuate with minor temp change.

 

Isn't the purpose of nitrogen that it's not supposed to expand and contract under temp change? I have it in my truck, but had to add air. The dealership adds nitrogen.


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If you added air then you don't have pure nitrogen.

It does expand and contract. It just does it consistently where normal air is inconsistent in how much water vapor is in it and such

 

Fifth gear video was entertaining!
One issue we can reduce the effect of is the varying amount of water vapour in air, causing inconsistent pressure variation with temperature. So filling with air contained in a high pressure tank with a water dryer, as found in an old-style service station/tire store/your garage, should be much dryer than filling tires at a modern gas stop with a $1 compressor station and no water separation while it is raining.
An issue we can't help is the N2 or O2 permeating out thru the ribber - and at least one source says this an issue with O2 leaking 3-4 times faster than N2. http://www.getnitrogen.org/pdf/graham.pdf
Don't know how to do N2 at the track anyways, but I always take a full air pig with me.

 

i'll take air

 

Well that is the only reason given for using nitrogen, the issue is does it work and is it practical. The jury seems out.

 

It doesn't fluctuate as much
it fluctuates consistently
It doesn't lose as much pressure over time.

No it is not practical. Not when many stations don't do it right anyway

 

nitrogen expands and contracts with temperature change. it does not negate the need to check tire pressures either. for example, aluminum rims will lose more air than steel in drastic temp changes. hitting a curb may cause a drop in pressure. f1 uses nitrogen because they are precise. they do not run a tire half a pound off of optimal. when was the last time you ran your car at an exact hot temp and compound for the particular road surface?

want to know a big reason F1 and aviation use nitrogen? so they don't have to lug around a compressor. cheap dry air.

 

Fun facts on the use of nitrogen.

http://www.getnitrogen.org/why/