"Not sure how he would evacuate the normal atmospheric air form the
process [...]"

Good question . . . aren't they just pushing nitrogen into a tire that
is already at 87% N at atmospheric pressure?

Quick, someone do the math: after inflating a tire to, say, 40 psi by
adding nitrogen atop regular air at atmospheric pressure, what's our % N?

--
Jack "Rocket j Squirrel" Elliott
1984 Westfalia, auto trans,
Bend, Ore.

On 10/17/2015 02:57 PM, Max Wellhouse wrote:
> Eric:  I have a friend here in Cedar Falls Iowa that fills his tires
> exclusively with nitrogen.  He runs a really small tire mounting and
> balancing shop out of his garage and does mobile repairs as well.  He
> says that in order to mount tires and fill them with nitrogen, you
> have to make sure the bead sealing surface is absolutely pristine, so
> there's no chance of micro leaks from pitted sealing surfaces.  I
> think he charged like $10/tire to do the fill.  Not sure how he would
> evacuate the normal atmospheric air form the process, but I have used
> his services on my Vanco II Continentals mounted on Mercedes CLK
> forged aluminum rims(mounted on my 90 GL  BTW)  and they haven't lost
> 1 psi in like 4 years.  I think Tire Rack offers the service as well.
> NASCAR Racers use nitrogen     YMMV