Here's what I don't get about the "bead balancing"....supposedly having all these beads inside the tire will evenly disperse and thus balance the tire.
But that's the problem....centrifugal force will evenly disperse them. They're not magically going to all collect where needed. The only case they would work is if a light spot in the tire corresponds to a slight concavity in the inside wall of the tire, and that spot happens to be the exact right size to hold the right number of beads to offset that light spot. Not very likely.
I've seen lots of reports claiming these work great, though I have yet to see a true before-and-after. As in a bike that had vibration w/o wheel weights, beads were added, and the vibration suddenly vanished. Chances are 99% of the cases where they "work great" there would be no noticeable problems with no balancing means at all. The other 1% I suspect the extra 3oz or whatever of weight serves more as a damper to vibration(think bar end weights), rather than correcting the imbalance in the first place. Masking rather than fixing.
I've read several reports of people testing out of balance wheels on a dynamic spin balancer. Every single time, there is zero difference in output before and after the beads. As in it's out of balance by the same amount in the same place.