Dyna Beads Motorcycle Starter Kit | No Longer Availalble | Rocky Mountain ATV/MCI saw them a while back and thought I would do an experiment. Took the weights off the two wheels that had them and went for a high speed run. Very noticable vibration above 50. Went back to the shop and put in 4oz of these in every tire. Another test drive, no vibes. Very low tech experiment i know, but I am happy.