Reply With QuoteWhat is the advantage of having nitrogen compared to Air....if they're at the same pressure?
As for the kPa to Psi....250kPa is roughly around 35ish Psi.
1Bar=14Psi=100kPa=1atm(easiest way to remember it)
38psi cold all round in 205/40ZR17's on my Corsa SRi. I use nitrogen tho, not air. Arguably better and get it topped up for free. Hard ride but love the handling.
__ mods _ opelised _ 17" advanti medusa's _ slotted front and rear rotors _ whiteline rear sway bar _ k&n panel filter _ ice install __ facelift headlights _ window tint _ de-rubstripped _ smoked indicators and rear fogs _ stubby aerial _
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What is the advantage of having nitrogen compared to Air....if they're at the same pressure?
As for the kPa to Psi....250kPa is roughly around 35ish Psi.
1Bar=14Psi=100kPa=1atm(easiest way to remember it)
The nitrogen doesn't expand as much as air when it heats up due to no water molecules so the pressures stay more even and give better wear, and the tyres run slightly cooler at speed (not a big difference).
Because there are no water molecules in there you also dont have to worry about the inside of your wheels rusting, good if you've spent a bit on your wheels. Other advantages too...
http://www.toyo.com.au/tech_info11.html
This explains it pretty well.
Last edited by immenotu; 3rd September 2007 at 01:13 PM.
__ mods _ opelised _ 17" advanti medusa's _ slotted front and rear rotors _ whiteline rear sway bar _ k&n panel filter _ ice install __ facelift headlights _ window tint _ de-rubstripped _ smoked indicators and rear fogs _ stubby aerial _
_ click here for the barina car club of australia _
Pressure build-up when the tyre is hot is a factor to consider. I check my cars in the garage early mornings. Given Canberra's cold mornings, by mid-afternoon in the garage the 'cold' pressure has risen by 10kpa to 260. Park it in the sun for an hour and the 'cold' pressure has risen another 10kpa to 270 (which is about as high as I want to go).
36/33. 2002 barina sri, 17'' stock alloys
I used to put in about 32/31, but the tires wore out significantly more on the outside, so it means they were underinflated...
The right pressure is whatever wears the tires out evenly... that way the tires is evenly in contact with the road, meaning you make the most of the surface area of the tire in contact with the road...
I still dont know if the pressure is right, but the instructions on my fuel cap were clearly rubbish because the tires weren't wearing evenly...
Last edited by shadow; 22nd October 2011 at 01:55 AM.
(2002 barina sri, 17'' stock alloys)
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