Yung purpose ng wheel balancing is to make sure that the wheel and tire package is. .... "balanced" :-) Hindi kasi perfectly round ang wheels and tires so yung balancing is done to make sure na at high rotational speeds, yung tires and wheels do not veer left or right. Bale yung angular momentum nung wheel must be at 90 degrees sa direction of motion. Yung balancing is done by adding lead weights sa wheel. Madaming service centers that can do wheel balancing, for starters, try your nearest servitek outlet.