Gas in your tyres

[just trouble]

Hello fella's.I had two new tyres put on the back of the Griff last Saturday.The guy fitting them asked me if I would like to have Nitrogen gas used to inflate all four wheels.I asked what were the benefits of using gas as opposed to air.He informed me that once filled with Nitrogen then the tyres would not expand or contract with temperature changes and that I would not have to regularly check the tyre pressures.Has anyone else had this done?

[Le TVR]

Well I run mine on 80% nitrogen, seems OK. Could let you have some at a good price?

[Podie]

Nitrogen is less affected by temperature / pressure changes than oxygen / air...

[TomPob]

Helium...now that would be good..."Roads?...who needs roads"

[Le TVR]

[/humour]
[science]
Under Ideal Gas law nitrogen will be almost imperceptably (sp?) less effected by Pressure-v-temperature than air which is 78% N.
The best gas for minimal variation is Helium.
The advantage is just that some tyre rubber can be permeable to oxygen and pressure could be lost.
[/science]
[humour]

and helium is more fun too

[kojak69]

Ive been advised to try nitrogen. Not sure where to get it from though.

[zumbruk]

I imagine that nitrogen for tyre filling is aimed at the same market as people who would pay Coca-Cola 90p/litre for tap water.

[rev-erend]

The formula one boys have been using this trick for a few years..

It's a worth while small investment but can still find leaks in the valve or rim if they are poor !

[Heliox]

If you need helium i've got stacks.

h

[icamm]

There was a similar post on here recently (general gassing IIRC). The consensus was that.

1. You need to know what the running tyre pressure should be. IE when hot. All pressures given by manufacturers are cold air pressures.

2. You need a ready supply of the stuff if you have any sort of leak whether it's from a rim, valve or puncture.

[deeen]

helium would be good as it would reduce the unsprung weight.

nitrogen, hmmmm, i think it is on the shelf next to the snake oil?

[just trouble]

zumbruk said:

I imagine that nitrogen for tyre filling is aimed at the same market as people who would pay Coca-Cola 90p/litre for tap water.

True, but I don't drink water only Stella Artios and yes it did cost £2.55 per tyre but hey my Griffs worth it

[tvrbob]

If you are to use nitrogen in your tyres you must first find out what your normal running pressures are. That's not the pressure as specified in your handbook, it is a higher pressure which your tyres are expected to reach once they are warm. If you set them at the handbook pressure and use nitrogen you will actually be seriously under pressure for normal use.

This has been covered at length before.

[anonymous-user]

Mmmmm Hydrogen

[zz top]

just trouble said:

Hello fella's.I had two new tyres put on the back of the Griff last Saturday.The guy fitting them asked me if I would like to have Nitrogen gas used to inflate all four wheels.I asked what were the benefits of using gas as opposed to air.He informed me that once filled with Nitrogen then the tyres would not expand or contract with temperature changes and that I would not have to regularly check the tyre pressures.Has anyone else had this done?

JT, did you have this done?

[just trouble]

oh yes zz I did

[zz top]

just trouble said:

oh yes zz I did

Great,i'll get mine done on Saturday.zz

[gooner]

As others have said, this is discussed elsewhere. The main advantage of Nitrogen is the purity, i.e. no water vapour as in normal air. All the people who have pointed out that air is mainly Nitrogen, it can't make that much difference etc. are right, but the water vapour in ordinary air can make a big difference as it evaporates/condenses.

[boosted ls1]

If you suck on the valve will you get a buzz?

[Waveboy14]

Don't see the big advantage of nitrogen, however Helium is worth a try?

Really wondering right now if Helium would improve rebound of the tyres or if they get them heavy in the negative sense (up). (I'll try to look it up.)