Tyres

[mx125]

What are the rules about using nitrogen instead of air in tyres ?

Being in a sport where any time saved helps a lot would using it be of any benefit ?????

[iranoff]

Try helium.

[Craig Powers]

Originally Posted by mx125

What are the rules about using nitrogen instead of air in tyres ?

Being in a sport where any time saved helps a lot would using it be of any benefit ?????

I doubt that the tyre temperature variation would justify its use in our sport.

[Hasta]

Originally Posted by iranoff

Try helium.

Wouldn't that make tyre squeal sound funny

Hasta

[The Voice]

Originally Posted by Hasta

Wouldn't that make tyre squeal sound funny

Hasta

I have terrible images of Joe Pasqualie in my head now thanks Hasta

[darcia1]

Originally Posted by mx125

What are the rules about using nitrogen instead of air in tyres ?

Being in a sport where any time saved helps a lot would using it be of any benefit ?????

I have thought about of this u would not use nitrogen on the hills as u would want the air inside to grow the tyre very quickly.. nitrogen great for circuit as its more stable forlonger distances.. where pressure really matter though would have to test to get results though id have thought if the voice uses it i see no difference in pressure from the mike

[yobdab]

Originally Posted by mx125

What are the rules about using nitrogen instead of air in tyres ?

Being in a sport where any time saved helps a lot would using it be of any benefit ?????

Nitrogen being 78% of air the tyres are going to be rather flat!

[SteveM]

Originally Posted by yobdab

Nitrogen being 78% of air the tyres are going to be rather flat!

is ok will only be flat at the bottom .

[AndyMil]

We had a discussion with the guys from Protyre(Michelin) at Croft about this as the regs for the G50 state "air", their opinion was that if you look after the air you're using, ie; dry and cool, you get no real benefit from running Nitrogen, and this in a race series where the heat transfer to the air inside will be much higher than on a hill or sprint.

[whimsy]

As I understand it, the main advantage of using nitrogen is that tyre pressues remain static as temperature rises. Normal air (as opposed to specially dried air) contains moisture and as the day warms up so the tyre pressures rise dramatically (3 to 5 psi), certainly enough to screw up grip and /or a nice balance on a car if they're not re-set.

Personally I'd rather just use my foot / electric pump and set my tyre pressures for the first run, and check them before each run, than have to lug a nitrogen bottle around! As most wheel/tyre combinations leak a little its not just a case of top up and forget.

As to pressure rise during a run - I can't honestly say I've ever found that to be an issue. Knowing the pressures are right at the start has been enough.

Is the use of nitrogen actually legal? Don't know, but its not dangerous, and I don't know how anyone could check once its in the tyre!

W