MattyB1983

iTrader: (51)

I was chatting to a chap today who owns a 645i. He was telling me that a local tyre shop now stocks nitrogen and he uses it in his tyres, costs him £2.50 a wheel.

I know some super cars now have this from factory but have any of you guys used it ?
What's the benefits of it ??

Blue by You

iTrader: (23)

Info here - http://www.theaa.com/motoring_advice...-nitrogen.html

taylor85

iTrader: (5)

Ment to last longer and not escape as easy , I use it as it's free lol

BrownPantsRacing

iTrader: (6)

My spare tyre is filled with methane!

bustaMOVEs

iTrader: (31)

Dosent expand in hot temperatures like on track days so better psi manageable.

rb5 stu

I use it, it makes the steering feel more direct and as said above you could check your pressures in 6 months and they wont have went down any.

Laupy

iTrader: (2)

I fill mine with 78% Nitrogen for free!

dabiscuit

Where do you fill it up from? Buy your own cylinder?

rb5 stu

Yeah you know all.

stedee

iTrader: (4)

Lol and me.

JGlanzaV

iTrader: (3)

Sounds like a gimmick to me.

Air is 79% nitrogen anyway so is the 21% going to make a noticeable difference apart from under the harshest of conditions? I very much doubt it.

I think what you have here is a placebo....

Also a good way to make an extra few quid every time you do a tyre....!

Donnie Brasco 46

iTrader: (2)

If it's good enough for F1 teams to use it then it's good enough for me. Saying that though I've never used it in my car as it does seem a little gimmicky.

Anger

iTrader: (4)

You need proper twin valved wheels to get 100% or there will always be some normal air to expand in the tyre

ditchmyster

iTrader: (7)

You could stick a match between your teeth and suck all the air out, it's a cheaper alternative to twin valved wheels.

CharlySkunkWeed

iTrader: (7)

Ciaran

iTrader: (16)

Bought a new set of BBS alloys 28 months ago and they have not once needed air added.
Bought a new passat 2 months ago with BBS wheels fitted and had to put air in 2 already

rb5 stu

The air is the problem, theres moisture in it.

JGlanzaV

iTrader: (3)

You have knocked the nail on the head there. Fill your tyres with nitrogen itt will still make no difference unless you suck all of the air out then there will still be moisture etc in it.

So its pointlessm...

rb5 stu

The tyre is filled with nitrogen and then sucked out again and then refilled so there is no moisture left.

JGlanzaV

iTrader: (3)

Of course there is moisture and air left. Unless you pull a vaccuum for a period and leave it to draw all the moisture and air out then there will be residuals left over.

Its not different to doing an ac system where you can't hair air and moisture in the pipework.

Anger

iTrader: (4)

Jap Motorsport wheels often come with two valves

johnny subaru

Looks like some shock absorber lubrication going on
in that pic.

Anger

iTrader: (4)

Wow was your first post as funny as that one ?

GeeDee

iTrader: (2)

Apologies, but that's boll ox

Nitrogen is a gas - ALL gases expand when heated which results in higher pressures if that expansion is contained, in this case, by a tyre. Boyle's Law seems to spring to mind in my distant days of physics but that involved constant temperature.

I've been using and advocating the use of nitrogen for years but recent testing has resulted in finding that the only real benefit for car tyres is that using nitrogen means the tyres remain at pressure for longer. ie it doesn't leak out through the rubber like oxygen. For those smarties who know that oxygen is heavier than nitrogen and therefore must be larger, as I once did, are wrong. It's the size of molecule which counts ie O2 is smaller than N2 and is small enough to permeate out through the rubber molecules whereas N2 isn't.

Physics and Chemistry mode OFF!!

What my testing has also revealed is that the difference in tyre temperatures between winter and summer result in a much larger difference in tyre pressure than the difference between "cold tyres" when stationary and "hot tyres" when driving - something I hadn't considered previously.

urban

iTrader: (1)

Nitrogen filling for a premium sounds like a good old fashioned con to me.

Yes sir, that's all 4 tyres filled with nitrogen - that'll be £10 please.

GeeDee

iTrader: (2)

I used to get it thrown in for nothing when buying a set of 4 tyres.

Perversely, the only time I've paid for it was when getting a puncture repair done and I asked specifically not to fill with nitrogen as part of my experiment mentioned above. When it came to paying the bill they had added nitrogen automatically and I couldn't be bothered to get it removed as I was in a bit of a hurry.

PODWRX2

Come on guys...unless your looking for thousanths of a second per lap advantage then its a complete gimmick especially in a road car. Yes nitrogen is a more stable gas than normal compressed air but would you notice any difference under normal driving...very much doubt it. I've noticed that a few of the main stealers are offering this as an additional charge on routine service visits - one dealer offered me an engine flush on my wifes 4500 mile fiesta recently as it was reccomended. Its all about getting more revenue from the unsuspecting punter!