I like you, too, Brian. Even if you have a know-it-all attitude that is often unjustified. A rope plug in a tire no more inhibits the flow of the dynabeads than a twig inhibits the flow of a river. Of course, there may be a small delay or diversion, but the twig will not dam the river. If you had 40 or 50 rope plugs in a tire, dynabeads would probably not work well.
Again, you seem not to grasp the concept of what the beads do and do not do within the tire. Not that it is a big deal. Perhaps trying to correct a misconception on the internet is a loser's game. Perhaps even a sensitive loser's game.
Your turn.
When the wheel is in a static/constant motion I feel safe that they will find their home. What happens to those beads during mild to hard braking? What happens to them on irregular roads? Add in plugs and everything changes, which of course should include the TPS. Machine testing in a controlled environment will not replicate what we get on the street. Finding that light spot and fixing a permanent weight removes the variables you have with free floating beads, I wonder, do MX riders use these?Under mild braking, the centripetal force of the rotating wheel is stronger than the inertial force of the braking. Hopefully I'm using the terms correctly. At some point, the braking forces can/will overcome the spinning forces and the beads will start rolling within the tire. The heavier the braking, the higher the speed where the beads will "destabilize".
Under mild braking, the centripetal force of the rotating wheel is stronger than the inertial force of the braking. Hopefully I'm using the terms correctly. At some point, the braking forces can/will overcome the spinning forces and the beads will start rolling within the tire. The heavier the braking, the higher the speed where the beads will "destabilize".
As a side not, the beads will take somewhat longer to stabilize under heavy acceleration, based on the same principles.
As I understand it, the beads require some irregularity in the road surface to function properly. They also require a minimal speed (about 20-35mph IIRC) to stabilize. If the road is so irregular that the minimal speed cannot be maintained, the beads will be ineffective.
The difference between tire plugs and TPS, as far as the function of the beads is concerned, is the location of the "obstruction". The TPS is on the wheel, while the beads are "thrown" outward, and do not come in contact with the TPS in normal operation. The rope plug is in the area where the beads flow, but the beads will flow around the plug without restriction.
The beads are not recommended by the manufacturer for racing. I have no information on whether any MX's are using them.
More information is available on the mfg's website: http://www.innovativebalancing.comsLike all products, they fit some users and applications better than others. For a sport rider that goes through tires in 3k miles or a racer, they make little or no sense at all.
<rant on>There are so many forces acting upon a tire (and more-so a motorcycle tire) that Dyna-Beads are snake oil. Even the manufacturer cannot prove these balance a tire actually mounted on a moving tire. I can invent many ways to balance a statically mounted tire and make all sorts of claims. I am not saying they cannot balance a tire once you get up to speed and hold that speed steady going in a straight line with no bumps or imperfections in the road, but what good are they in the real world driving situations? I especially want a tire that is balanced if I am making an emergency stop, swerving to avoid something in the road, or just having fun accelerating as hard as the bike will let me. I don't want my tire to become unbalanced again just because I slow down, make a turn or hit a bump.
My opinion is that you cannot have anything that will act the same regardless of the physics involved, it is impossible (can you tell I am 100% against dyna beads?)<rant off>
[-snip-Nope, but it is a fair exchange of ideas
[redundancy] No one is forcing you to buy or use them if you don't want to. [/redundancy]
I'm betting Ambrosian burl wood chips would be effective, fixes almost as much stuff as Sea Foam and KIPASS
I really ought to get a commission.
Late edit: The person who has been inside the moving tire probably could also tell us about his experience inside a crankcase, and in a gas tank, etc.
I'm betting Ambrosian burl wood chips would be effective, fixes almost as much stuff as Sea Foam and KIPASS![]()