There is no force available to make beads inside a tire move to a specific point 180 degrees from the source of imbalance. In fact the same force that keeps water in a pail swung around your head would force the beads to the point of maximum displacement; making the problem worse. Whether the point of displacement was static (out of round) or dynamic (unequal mass distribution).
Wow, just hours after this post appeared, a video for the Centramatic balancing system was posted as well. Check the part with the strobe lighting, showing the balls moving EXACTLY
how Mark claims they cannot and wiil not, to the point opposite the "heavy" part of the wheel. Also note how the wheel comes into balance when this repositioning occurs. There tends to be a lot of bogus science on these boards, but I'm pleased to see this erroneous claim unmasked in such short order. Very gratifying. This technology has been around for years in various guises and apps, as others have alluded to.
rgconner makes a much more substantive arguement, in my view. RG, correct me if I get this wrong, but to paraphrase you seem accepting of the technology, but dubious of the effectiveness of the beads vs. the metallic balls in oil that the Centramatic uses as an effective balancing tool. I can see your point, given the low mass of the balls they might indeed move about when jostled, upsetting the balancing. However, I think you may be underestimating the extrememly strong centrifugal force generated when a wheel rotates 15 or more times per second at speed. I would suugest these forces would strongly resist such a redistribution, and the correction would occur extremely quickly if such displacement occured in the first place, which I doubt. Further, I would think you'd find users reporting some sort of intermiitent vibration or wobble if your scenario were to occur, and I've never seen anyone mention this in the many dozens of reviews I've read.
Those who have chosen to respond with constructive criticism of the bead system on this thread seem to fall into 3 categories. One is a general concern about practical elements like warranty coverage, or I'm happy with static balancing- why try something suspect, etc. Secondly there are guys who just cannot fathom and/or deny the technology- you guys need look no further than the Centramatic video. As I have said, this technology is not new, and the principle of inertial balancing has been used by truckers and others for many years. Third are the smaller group who might accept the technology, but don't think the tiny little beads will be an effective application of that technology.
I am as skeptical as the next guy, more than most actually. 15 years ago I never would have tried the beads.... they just sound "gimmicky". Today, however, we are in an age where information is so amazingly available online. It was on a forum like this that I first heard about Dyna and began to investigate. My goal in this thread is just to disseminate what my experience ( and the experience of so many others) has been so this information can be shared on this forum and people can have an intelligent alternative for wheel balancing.
