My fathers friend installed dynabeads a while back on his cruiser and i just wanted to inform everyone that when he took the tire off to install a new one he found the dynabeads had cut grooves all over the inside of his tire. They had cut so much out of the tire that there was a fine black powder covering everything inside the tire (ground rubber).
Just thought id spread the word. Maybe it was just a freak scenario, but id research it a little more b4 you install them.