Dyna Beads are high-density ceramic beads that, when easily installed, continuously balances your tires as you ride. The amount of material will distribute itself in weight and position dependent on the balance requirements of the individual tire. The result is a smooth, vibration-free ride, derived from our balancing media that is always repositioning itself as the tire wears. If you want to get rid of those wheel vibration and tire cupping problems, then you need to move up to Dyna Beads?! Determine how many ounces you need 80 - 120 mm tire width 1 oz 130 - 230 mm tire width 2 oz 240 - 360 mm tire width 3 oz For use with tubeless tires, AND tires with tubes. Simply dump them in tire when installing.