Nitrogen filled tyres?

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Tweefo (September 26, 2008, 07:23:54 AM):
I was behind a truck yesterday with a sign on it that the tyres are filled with Nitrogen. Somebody also told me that he use this on his car - handles better. Can this have an effect? Logic tells me that the tyre would not know what gas is in it. Is this another yuppie fad or do different gasses behave different under these conditions?
mdg (September 26, 2008, 07:39:29 AM):
I know someone in the tyre business and asked him the same question.

I don't know the science behind it, but I do know that a lot trucks and some private motorists use nitrogen in their tyres. The tyres last longer, are kept cooler, encourage fuel consumption, and there are fewer tyre failures with nitrogen filled tyres.

Tweefo (September 26, 2008, 08:44:20 AM):
Sounds fishy to me. How can the outside of the tyre behave different on account of what is inside?
Tweefo (September 26, 2008, 08:52:52 AM):
OK, followed the link now. Still sounds fishy. Maybe in a truck - higher pressure. But a normal car? Car companies would have put the cars on the marked like this if it was better.
mdg (September 26, 2008, 09:34:45 AM):
I did a quick search - nitrogen is used in F1 cars and in other motor sports, as well as in aircraft tyres. The main reason being that it's an inert gas and in the event of a fire it doesn't add to the problem, like a normal air filled tyre would. And..........

Most importantly, by using it to reduce the concentration of oxygen in a tyre it possible to equalise the partial pressure between the air inside each tyre and the surrounding atmosphere.

As a result, the common problem of slow deflation caused by oxygen slowly leaking through the tyre wall is virtually eliminated, thereby ensuring that tyres remain at their correct pressures between vehicle servicing.

This has the added benefits of improving fuel consumption and of enhancing safety by minimising the danger of under inflation.

I think the reason that we in S.A. don't use it as much as they do in Europe is because there aren't enough depots for us to fill our tyres with nitrogen. I know there was a depot in Benrose, Johannesburg, I'm not sure if it's still there. Transport comapnies have their own private depots because nitrogen isn't readily availble anywhere else.

Hope that helps ;)


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