I don't have any personal experience with the balancing beads, but with the small physics and engineering background I think all the high points have been hit. The beads work great for mechanical vibration correction for objects with a steady high velocity (highway speed driving) or a large radius (where the beads have a faster distribution rate from rest). If you spend a lot of time at slower speeds or have smaller tires, the beads don't move quickly enough into position to do their job effectively during stop and go traffic. In the latter case, it's best to have the static weights on the rim, ready for any speed.
So here's the $64,000 question: Where is the threshold? How big a tire do I have to run to make this effective for my wallet, or how often do I have to be driving on the highway?
