Dynabeads - Anyone use them?

[Radar]

You guys hurt my head.

Next tire change, I'm gonna try 'em.

[Howie]

Tiz,
you are comparing apples to oranges though.
You are comparing static vs dynamic balancing agents.
Static being lead weights, they sit on the rim and balance the wheel, whether on a fixed axle
or a suspended axle.
Dynamic being the beads, because the can move within the tire carcass. On a fixed axle they will
do nothing. The suspension movement allows the beads to distribute away from the heavy
side of the tire, the beads don't work without suspension.

Umm, actually static imbalance is uneven distribution of weight in the plane of rotation (up and down), dynamic imbalance is uneven distribution of weight to the Right and left (side to side).

[Howie]

should be a very simple issue.  put them in a new tire and run them on a balancing machine.

Better than that, balance a known, good used tire and wheel assembly.  Then add an ounce of weight in a random spot.  Put tire on machine.  Note readings.  Now add Dynabeads.  Did this fix the imbalance?

[VisceralReaction]

We already know that the beads will do nothing on a tire machine since they need the movement of
the suspension to distribute away from the heavy spot/s

[VisceralReaction]

I give up.
Both methods work.
Use what you want. 

[ducatiz]

my point was that if they balance a tire using a traditional method of checking balance, then they should at least perform as well as the traditional method of balancing said tire.

similar concept in this video:demonstration using a motor with a simulated suspension

How Centramatic Balancers Work

[NorDog]

my point was that if they balance a tire using a traditional method of checking balance, then they should at least perform as well as the traditional method of balancing said tire.

similar concept in this video:demonstration using a motor with a simulated suspension

How Centramatic Balancers Work

Very cool.  But where do I get one of these nifty strobe light friction brakes?

[chris1044]

The problem with using a standard rotary tire balancer (road force or otherwise) is the machine isn't set up to spin the tire long enough for the beads to disperse along the centerline of the tire.  If you put these in a tire, and spin it on a balancer, more than likely you get a different "out of balance" reading each time....

At least that's how it works with car tires...because I've done it.  These aren't a miracle cure...they do take time to work, and they do take time to "recover" when the tire motion is abruptly disturbed.  However, they do work.  Rig a tire machine to spin longer before it takes a reading and you'll find the longer/faster the tire is spinning before the reading is taken, the closer to being in balance it is.

[VisceralReaction]

^ UGH I don't understand why everyone doesn't "get" this.
The beads will NOT work on a standard tire balancer, not because it doesn't spin long enough but because
it is a fixed axle. The beads HAVE to have suspension to be able to disperse correctly.
As shown above in Tiz's video the wheel is set up with suspension not a fixed axle.

[IdZer0]

Anyone else thinks that the vibration with the beads (and without the magnet) is worse than without the beads (and without the magnet)?