Yes, that's where they were introduced, smaller packets than truck tires though. Every tire balanced with beads require the special valve cores that have a filter to prevent beads/dust from getting into the core and causing an air leak.
This is exactly my experience. At 50 the coach was really shaking. On the drive home it did improve quite a bit but not completely. Chuck
They don't actually settle in (or anywhere), but on large tires they just toss in a bag or two of the beads and expect that driving will cause the bags to break open and let the beads scatter to do their thing. Once in awhile the bag may not break right away. Until that happens, there is no balancing action. Might even make it worse.
Can you name some of the tire manufactures that void warranty with some type of Documation
I think that's a misinterpretation. They will void the warranty if you try to use some ersatz "foreign material" as a dynamic balance medium, e.g. golf balls, beach sand, Styrofoam pellets, and various liquids (antifreeze, vegetable oil, etc). People have tried using all sorts of stuff rather than buy the beads made for the application, unsurprisingly resulting in tire damage. I don't believe that any manufacturer disapproves of balancing products such as Equal, Dynabeads. EZTirebeads, etc. Most heavy duty tire shops use them and the warranties are not affected..
www.goodyearautoservice.com
It's speed (tire rpms), not miles that affects dynamic balance beads. The beads rely on centrifugal force to distribute the beads, so every time you stop moving the beads fall to the bottom of the tire and balance is temporarily "lost". Then the beads spread out again as you pick up speed. But tire balance is irrelevant when stopped or even very low speeds - you could drive at 3 mph all day long on a badly out-of-balance tire and never know it, but a few seconds at 25 mph would surely be be felt (and seen if watching from along side).
