On Tue, 5 Oct 2010 23:00:27 -0700 (PDT), Roy
wrote:

My hand truck came with Chinese made tubed tires. They have NEVER held
air for more than a week. Where do you get quality tubes that don't
cost more than the hand truck did? Thirty dollars for the hand truck
and ???? $$$ for the tubes a rip-off for sure.

The problem may not be the tubes, but instead a leaking valve stem.
Remove the cap, then, put a little spit on your finger and cover the
stem. You will be able to see air leaks.

Or, just tighten the stem valve with the little valve stem and put the
cap back on.

If the tubes is a slow leak around the rim -- submerge the tire in a
tub of water and look for air bubbles leaking.

BTDT