Old replies but I figured I'd chime in as I've just gone through a month long balancing process with my tires and they have improved alot!
I ran Dynabeads in my Hutchinsons and it was a nightmare. The rubber Beadlock inside the wheel has two finger sized holes to allow air to pass through them. After not being able to get my wheels to balance, I took them apart and discovered beads had easily fallen into these air holes and were on both sides of the Beadlock, if that makes sense. No way to prevent it and get a decent balance with this design. Not to metion, Dynabeads customer service was absolutely terrible. Just my experience though.
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You can solve that by installing 2 air filters into the holes in the beadlocks. Stazworks came up with that solution.
I believe that you can add the beads through the valve stem and not have to split the rim. I'm sure that is not the case for all beads (airsoft bb's will not go through a valve stem) but the ones that are sold for dynamic balancing specially should.
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If you are running bead locks you absolutely can't add them this way, they'll get stuck.
What I've been 'told' is that the hutchinson beadlock won't reliably let the beads through the rubber ring and into the outer portion of the rim. But thats not coming from any personal experience, so could very well be wrong.
When I opened up my Stazworks wheels, which are split with the plastic beadlock inside, I had absolutely no beads that got past the beadlock. Most of them were stuck to the tire where they should be actually. I ended up vacuuming them all out!
I guess my concern if how well they work for dynamic imbalance, a bead lock that is constantly changing position. I tried centramatics and am not sure they helped much. If the beadlock is moving, it is also likely not reliably pinching the bead in position during air down maneuvers, so I am hoping to figure out a way to get them tight and stable first off.
I took it down to Nate Jones who did a combo of tire shaving, old school traditional balancing, and then a final balance with the tire on the truck, which balanced the entire wheel and rotor assembly. Its now amazingly smooth. He's really a master.
I was also having alot of irritation with the shimmy at speeds. When driving 10 hours a day it gets on your nerves!
My end solution to help the balancing was to vacuum out all of the beads and take them to a Goodyear truck service center who had a large enough balancer for my tires. I also was concerned about the inner beadlock donut, and was considering splitting the rim and removing it for balancing and then reinstalling marking where the tire and rim was, but I figure that in itself will cause more problems moving things around so I would just balance with them in place and hope they are negligible in how they affect the balancing.
After balancing I also added the centramatics and they seem to do well at nipping the final balancing of the tire. Perhaps they compensate for any movement of the donut?
In the end it still has a little bit of a shimmy at 65mph, but nothing like it used to! I do yearn for the days of 35" completely smooth ride tires at times, but the trade off is worth it now. Perhaps I need to drive to visit Nate Jones, lol. I never even heard of him or that he could take on balancing problems like this!