Everyone who has attempted to test the bead balancing (on motorcycle wheels, specifically) have reported that they can't measure any improvement. We also know that people are extremely prone to falling for placebo - if you believe things improved, and you really want to believe things have improved - you'll convince yourself things have improved. And once you do that, you're going to be a true believer and be completely convinced they're the greatest thing since they invented sex...
Thanks, croft. When I read some of the reviews by people who use beads, the first thing I thought of was the placebo effect. As you say, people see what they want to see. I completely agree with you about that. But I wanted to check the whole bead thing out a little more and see if there is anything to it. I found enough experienced mechanics and even guys who work for tire businesses who normally wouldn't be fooled by nonsense swearing by them so I thought I would dig a little deeper. I remain very skeptical but I will do a little more checking. I may open a separate thread on the subject. If they do work as claimed, balance wouldn't go out over time as it does with lead weights. I really doubt I'll use beads, though.