What I found with the beads is that they are dynamic.... meaning the results could be different every time. I tried some plastic as well as some stainless steel ones.
At low speed, they just kind of pool up in the bottom of the tire cavity. At some point they transition into being pinned to the inside of the tire carcass by centripetal force.
If the transition speed is too high, and your tires are out of balance enough, you'll get some jiggle before the beads start to work. For me this was 30-35 MPH, sometimes they failed to even out leaving some imbalance (this was a crap-shoot). I could slow down and give it another try, which would work sometimes, but was only really worth doing if the balance was really bad.
Also, they are subject to impact forces.... driving along at highway speed, you hit a pothole, causing the beads to be displaced... if the speed is great enough, the beads won't necessarily "even out" again. That leaves you with another jiggly ride until your speed drops enough for them to pool up and start over again.
And, they can be noisy, when slowing especially. When slowing the beads transition from being pinned to the tire carcass, to pooling up at the bottom. this can cause them to cascade onto the inside of the rim momentarily, making a strange racket which, for me, grew tiresome after a while.
Bottom line: I had low speed out-of-balance every time at speeds of 30-35 MPH, and high speed balance issues 30%-ish of the time with the beads. I determined that "dynamic balancing" means not really balanced at all. I pulled them out, dropped my beadlocks onto a cheapo Harbor Freight bubble balancer, and had a better ride.
Pro-tip: You can zip-tie some panty hose to a vacuum nozzle to remove the beads without letting the vac eat them.
'76 CJ-7, '43 CJ-2a, '78 Bronco,'78 CJ-7, '75 CJ-5, '78 CJ-7, '80 CJ-7, '78 SJ, '79 SJ, '78 and a '76 FJ-40 , '90 XJ, '91 XJ, '86 CJ-7, '95 ZJ, '68 CJ-101 Commando, '00 TJ, '68 M-715, 2 '86 Military Blazers, '96 LR Discovery, '86 CJ-7, '91 YJ, '99 TJ, 07' JKU Rubi, 1988 YJ, 1973 Commando, 3 Diesel Excursions....
Now back to a 2013 JKU Rubicon with "stuff", planning 37's with minimal lift.
I've tried them all... Jeeps are still the best. (0||||0)