Ken-Tool Balancing Beads are tiny glass beads with a proprietary bead coating which repels moisture and prevents clumping and features a unique memory technology to stabilize the beads inside of the tire. They use the rotating tire's centrifugal force to distribute beads to the critical point opposite the imbalance - regardless of the source of the problem. They respond to changes in speed and direction to maintain rotating balance. With Ken-Tool balancing beads, the results is a smoother ride, extended tire life, improved fuel mileage / + 2-3% resulting from less vibration and rolling resistance.