Gday, 2 years ago this month I went for a set of A/T tyres on the NW Pajero.The owner of the Bob Jane shop asked if I would like nitrogen in them for a few dollars more ?Why not sez me ! Now as an aside comes the nostalgia bit .... My dad was an old digger who came back from the war and became a back yard auto elec and mechanic .He was always into me about "lookin after yer bloody tyres " Well sadly the war came back and haunted dad when I was 34 and he fell off his perch.For 31 years since I have started his old compressor that lives under the workbench every 4 weeks I do all the familes tyres. Fair dinkum ! the pajero had 200KPA bunged into them in June 2014 and they still have 200KPA in June 2016. Don,t know why ,don,t care ! they are wearing well and always rotated so just wanted to let you folk ponder . Cheers
__________________
Westy. Some people I know are like slinkies. They look really funny when you push them downstairs !
bit hard to air up an air down to suit conditions unless you carry a bottle of nitrogen it may have it's benefits but is it practical if you have to keep adjusting your tyre pressure to suit different road an load conditions
Rubber is porous semipermeable membrane and allows gases with small molecules to escape through osmosis.
(This is why Helium balloons deflate quite quickly)
The air we breathe is comprised of lots of different gases but is approx. 78% Nitrogen and 20% Oxygen and 1% Argon, and the remaining 1% comprised of gases like Hydrogen, Helium, Neon, Krypton and Xenon.
It is that 1% that easily passes through rubber that causes you to need to regularly top them up.
So, why is pure Nitrogen used in tyres at all? Because it has a very stable temperature coefficient (expansion rate when your tyres get hot or cold). So who are the main users of Nitrogen in tyres? Large aircraft and drag racing cars.
Paying extra money for Nitrogen in your car or tug tyres is simply a big con job.
.
