There is a product for balancing tires which consists of tiny polished ceramic beads that you place in the tire, one or two ounces. The claim is that as the tire accelerates the beads will move to the lightest point in the circumference of the tire, thereby balancing the tire. The claim is that once the tire is balanced, excess beads disperse around the tire and have no further effect on the balance. Is this possible? The manufacturer claims that the oscillation caused by the heavy spot in the tire induces the beads to move to the opposite side of the tire and balance is achieved. Thank you.