"B A R R Y" wrote in message
...
Vaughn Simon wrote:
"Robert M. Gary" wrote in message
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I just got new tires for my wife's car. They're usnig Nitrogen too.
They put green caps on the valve steam to show its not air.

Yes, those green caps have proven to be much better at keeping the
snake oil inside the tire where it belongs.

On a side note...

- I learned a few years back that the CAP on a Schrader valve (the common
tire valve) is the PRIMARY seal. No cap, no promise of a good seal from
the valve.

- Green valves on bicycles mean the tire is "Slimed", and has a fiber /
goop sealant.

- Nitrogen DOES leak less than air, and is dryer than most compressed air.
While it isn't worth $59.95, some really good tire shops, and places like
Costco, provide it for free.

CO2, commonly used to quickly repair bicycle flats on the road, leaks much
faster than air!

- Anyone who's ever had an ice chunk in a tire can appreciate a "drier"
fill...

CO2 also has wildly varying pressures with changes in temperature, and he
effect is worse at higher pressures. Of course, the same was true of the
various forms of Freon, which were previously used in canned quick repair
kits.

Peter