"DRP535" > wrote in message
news
> On Mon, 03 Jan 2005 19:18:24 -0600, Kevin Oberle >
> wrote:
>
>>I was just at my friendly neighbourhood Costco and saw a sign advertising
>>that they can fill your tires with nitrogen instead of ordinary air. This
>>is something I've never heard of, though if the idea has trickled down to
>>Costco it must have been around for a while.
>>
>>What are the benefits of using N2 in one's tires?
>>
>>Kevin
>
> What everyone has failed to mention so far is how do they get the air
> *out*
> of the tyre in the first place to replace it with "pure" nitrogen?
>
> When you mount a tyre to a rim you don't do it in a vacuum do you? The
> tyre
> is already filled with air (and all that contains) before you've even put
> a
> pump nozzle on the valve. Big tyres like those on airplanes and dragsters
> contain a *lot* of air. You can't get a tyre inflated with pure Nitrogen
> no
> matter what you do.

Yes, of course they pull a vacuum on the mounted tire first... NOT!

MaltHound