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[cem_devecioglu]

Thinking about it, I would say it's less safe to have nitrogen in one front tyre than air in both.

I'm going to fire off a stiff letter.

wont be a difference, either be it a fart gas

[Field Marshal Dr. Opti]

Took a tyre to kwik fit today for a puncture repair. Total cost £22.50 which included £1.50 for nitrogen inflation. Why?

The knuckledraggers at Kwik Fit saw the old boy coming a mile off. Shame.

[Del Boy]

I thought it was to do with molecule size in that nitrogen molecules were 'larger' than standard air thus did not leak through the gaps in the rubber/tyre molecules......

That's what I was told. Holds pressure longer, more stable blah blah. All I noticed on my sons car was that it made it ride a bit harder, saying that though, he didn't have to put any air in for a long time.

[cleggy]

Took a tyre to kwik fit today for a puncture repair. Total cost £22.50 which included £1.50 for nitrogen inflation. Why?

The knuckledraggers at Kwik Fit saw the old boy coming a mile off. Shame.

The local tyre shop down the road does punctures for a fiver 

Concorde ran over some debris on the runway which burst the tyre and flipped it up to puncture the tanks IIRC

[Taxi_Driver]

Its obvious really why nitrogen is better than air in the tyres.....

Its lighter than air......therefore will help 'lift' your car off the road making it lighter....

Lighter car means more mpg......simples 










Nitrogen is lighter than air......but if you believe my explaination   

[jimac]

Nitrogen is lighter than air......but if you believe my explaination   

As air consists of 78% nitrogen (and 21% oxygen) it can't really be "lighter" than air.