IMHO the beads and centramatics should only be secondary to a good tire balancing. I have personally tried a new set of E3's on an 1800 with no balance, just centramatics and it had terrible vibrations, I then pulled the wheels off and balanced them and left centramatics on, and wallah it was perfect balance. I use a Parnes balancer and have excellent results with it. Dealers dont spend the time it would take to use these type balancers, they use the quick spin balancers and they just have too much room for error if they are out of calibration.