1. How do Centramatics work? 2. Should the tires/wheels be pre-balanced? 3. What about mismounted tires or improperly seated beads? 4. What is inside the rings? 5. Should the rear duals and trailers be balanced? 6. Can Centramatics help tires that are already cupped? 7. How are they installed? 8. At what speed do Centramatics start working? 9. How long do they last? 10. What about alignments? 5345 South I-35W Alvarado, Texas 76009 (800) 523-8473     Fax (817) 783-3267