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+--- Thread: nitrogen tyres. (/showthread.php?tid=65628)
nitrogen tyres. - taylor - 23-09-13
the wife,y bought some tryes for the car they have filled them with nitrogen, any reason why, ? only a fiver,
Re: nitrogen tyres. - DryRob - 23-09-13
No realworld benefit apparently...
http://www.theaa.com/motoring_advice/safety/filling-tyres-with-nitrogen.html
Re: nitrogen tyres. - chaz - 24-09-13
mobile tyre fitters used to use nitrogen, easier than having a petrol compressor to inflate them
Re: nitrogen tyres. - Farjo - 24-09-13
Perhaps tyres will end up with almost 100% nitrogen after a while and here's my theory. Buy a new tyre which is filled with normal air (78% nitrogen, 21% oxygen). Some of the oxygen permeates through the tyre so you re-inflate it with air. Assuming the tyre pressure went down by 10% the tyre is now filled with the original 78% Nitrogen and 21% Oxygen, minus the lost 10% oxygen, plus the replaced 7.8% Nitrogen and 2.1% Oxygen = 85.8% Nitrogen and 13.1% Oxygen.
Repeat several times and the proportion of Nitrogen will steadily rise, not to 100% but presumably into the high-90s%.
Re: nitrogen tyres. - jon - 24-09-13
Why does only o2 permeate through the tyre, and not nitrogen?
Re: nitrogen tyres. - positron - 24-09-13
Molecular size perhaps?
Re: nitrogen tyres. - Lawrence - 24-09-13
It's something to do with nitrogen expanding less with heat, so the pressure stays more constant.
It might make a difference in F1, but in a road car? Probably not.
Re: nitrogen tyres. - Jamieg285 - 24-09-13
(23-09-13, 09:09 PM)taylor link Wrote: the wife,y bought some tryes for the car they have filled them with nitrogen, any reason why, ? only a fiver,
So that someone can make money for no real reason.
Re: nitrogen tyres. - JZS 600 - 24-09-13
I used to be a trimix diver, don't fill your tyres with helium :lol
Re: nitrogen tyres. - jon - 24-09-13
Send her over here and I can replace the air for fresh for only a quid... probably needs doing weekly