On Feb 4, 7:06*pm, GM wrote:
*If you do fill the inner tube to more than
50%, the damping qualities of the wheel will rapidly deteriotate since
water is incompressible (but then, so is brass).

As far as I know, a 'Brass Wheel' refers to the hub, which is
typically made from cast aluminum or Nylon plastic, being made from
solid Brass. There is still a pneumatic wheel on this hub.
I also doubt that one can get the inner tube filled 100% with water
given the way the valve stem is positioned.
Since we are on this subject: has anyone ever tried to foam-fill the
tail wheel? Some wheels of industrial equipment gets foam-filled to
make them puncture-proof.
Uli Neumann

I filled mine with foam. It took care of a couple of problems. First
my tire constantly leaked and I wanted a couple of pounds of weight in
the rear. Took it to a truck tire shop, they filled it for a few
bucks. This was about five years ago. Works like a charm. PeterK