barry68v10 wrote on 12/31/69 at 16:00:10:Oh, if you want to research or order them go to dynabeads.com...
Will .177 BBs do the same thing? I think they fit through the valve stem.
We had some kids go though our neighborhood once, and they flattened dozens of tires by putting BBs under the cap to let the air bleed out.
Pretty trick little idea too, cause when I went out and found the flat, I didn't even notice the little BB fall out and roll away when I took off the cap...(of course, this prank was only "trick" because it was ingenious. They POed a lot of people)