I agree that the Centramatics work as designed, however, as Tireman said, they can and will mask or cover up a serious tire issue. Whenever I could not get a good spin balance, it was due to an out of round tire. As I mentioned before, the beads seem to work well in the back, but spinning the steers is the only way I will go.
2013 43 QGP Allegro Bus ( SOLD )
2000 AEV TJ