Tyre Pressure

[jidge]

41 psi on 235/40R18. was running 36psi and it cornered like shit with abit of understeer. much less understeer and 'IM ON A BOAT' feel.

as for nitrogen.

1- much less moisture in your rims/tyres.

2 - psi doesnt get higher with tyre temp (more stable pressure).

3 - pure nitrogen is more dense than compressed air, so less frequent pressure top ups at the servo. (perfect for trailer tyres)

That's what I thought (point 3). However, the story I heard was slightly exaggerated in that "You never have to pump up your tyres again"

[910trx]

That's what I thought (point 3). However, the story I heard was slightly exaggerated in that "You never have to pump up your tyres again"

doubt you can get a 100% seal but is it because nitrogen molecules are bigger or something, like how helium will escape a latex baloon but not air?

but the 75% nitrogen thing refered to normal air in the atmosphere, no one picked it up...

hmmmmm - dont give up my day job eh?

Edited April 9, 2011 by 910trx

[ironpaw]

I just dont think its worth it. When I had new rims put on my Mazda 3 they offered Nitrogen for $10 a corner...what a rip...

[bubba]

36 psi cold for 17 inch wheels, but every tyre is different

Definitely different for every tyre, on my old 17" Federals 38psi was the sweet spot, with the 18" Federals 45psi is sweet for me on the front but the Nexens I just threw on the back yesterday are happier at 40psi.

[jidge]

Atmospheric air is about 78% Nitrogen, 20% Oxygen and the rest made up of CO2 and a mixture of other gases.

Nitrogen (N2) molecules are slightly larger than Oxygen (O2) molecules. So the O2 passes through the rubber faster than N2. If you have a leak it makes no difference though.

Some light reading for those who are interested:

www.getnitrogen.org/pdf/graham.pdf