Aluminium wheels-slow air leak.

[George Selby]

At 11:48 AM 3/13/02, you wrote:
>I meant as you are driving, the centrifugal force will fling the condensed
>moisture to the wheel rim---gravity will suck it to the bottom lip of the
>rim when you are parked, there probably is only small droplets so there
>isn't enough mass to overcome the surface tension and/or static attraction
>to the lip to make it fall over the edge into the tire.

OK, I'm confused now, I'm pretty sure centripetal force drives objects to
the point farthest away from the center of rotation possible, which in the
case of water in a tire would be the inside of the tread portion , not the
rim some 2"-10" closer to the center of rotation.  At most, I would think
that the water might be able to sheet out across the width of the tire, but
as soon as it started to creep up the sidewall, it would be forced back to
the center.

As further proof of this, take a unmounted tire, put some water in it, and
roll it down your driveway.  The water stays in the tire, and distributes
itself around the inner side of the tread.  It does not creep to the
sidewall and then fall out the center while rolling, nor does it creep to
the sidewall, then go around the edge, then go back to the tread area, then
fall off.  If it did, it would make tire cleaning much easier after storage.

George Selby
83 Audi Coupe GT
gselby4x4 at earthlink.net