Dyna Beads

[Big Daddy Funk]

I ran a search and came up empty. Anyone ever use a product called Dyna Beads for wheel balancing? Seems like it might work but, application could be a different story. The idea of not having external wheel weights appeals to me. Thx Rick

[CatatonicBug]

Is this what you're looking for? They advertise specifically for bikes, so I don't see why it wouldn't work.

[egleaves]

I just read all about these on their website, interesting idea. I worked in a garage for a short time years ago and our wheel balancing machine was able to calculate the proper weight placement for adding weights to the inside of the wheel only. I would go out of my way to do this for anybody riding on something nicer than rusty steel wheels just because it looks better. These Dyna Beads sound even better for the wheel, especially a motorcycle wheel since technically that would be the only way to balance from the "inside".

[03mach1]

been discussed

http://www.xs11.com/forum/showthread...alancing+beads

[egleaves]

been discussed

http://www.xs11.com/forum/showthread...alancing+beads

That thread is only 4 posts long, that hardly qualifies as a discussion. I want to hear from the people who have tried this. Good points? Bad points? Anyone?

[DESTRO]

I have used these on my VStrom and my dirt bike both with good results. Make sure you consult the innovative balancing website for the proper amount needed for your tire and install tips.

Install on a bike is easy after you remove the valve core, fit up the motorcycle applicator kit, and have something available to vibrate the valve stem. Without this vibration the beads will jam up and not flow. In a pinch one time I tapped the stem with a screwdriver and poured really slow.

Both applications netted great results with no wheel weights. I do notice that at slow speed you feel a little "lumpiness" which smooths out as soon as you get rolling and the beads start to do their thing. The VStrom is glass smooth all the way to terminal velocity and the dirt bike is pretty close to perfect.

There are a few issues I need to mention. Make sure the valve stem is close to the bottom of the wheel when checking air pressure. I forgot that once when airing down an off road tire and one bead jammed the valve open causing me to completely flatten the tire. I carry a pump and a valve core tool so lesson learned. I also tossed our a few ounces of this product away after changing a flat one day. In hind sight I should have cut the tube open and salvaged the beads for another use. Not sure how many folks run tire slime, but you will not be able to do this with Dyna Beads and if you had a flat and add this after the fact I fear a big glob of wheel weight forming in the tire making for a miserable ride home.

Something else some of my friends have been using with good results have been airsoft pellets and after many miles there has been no appreciable breakdown. There is the downside that you have to break the bead and pour them directly into the inside of the tire.

Overall I think Dyna Beads are a great product and I will use them again.

[Ivan]

I am having trouble seeing how this would work. In an out of balance wheel the heavy spot will be further from the center of rotation than the light spot. A concentraion of mass in a certain point would be more like swinging a weight on a string. Now, since the heavy part of the wheel is farther from the center, and we consider centrifugal force as the major acting force, then we could consider the heavy spot to be equivalent to a low spot if the wheel were "rolled out" such that it is in a straight line so the centrifugal force parallels gravity. What products of this nature claim to do is migrate to the light spot. This is equivalent to putting water in a bowl and it flowing up the side and resting on the lip of the bowl. Or swinging a weight on a string and the weight moving toward your hand.

The stuff may have dampening qualities that mask a problem, but I am pretty sure they don't climb up hill. If it really worked, tire guys would just throw a hand full of lead shot in the tire before seating the bead and places like Coats manufacturing or Hunter Engineering would be making shot instead of wheel balancers.

[Jerry]

I've been using the Dyna beads for a couple yers now on the XJ. IMHO...they work as advertised.

Link is http://www.innovativebalancing.com/?...FQF-Pgoda1Yi7A

I used the recommended 1 oz up front2 oz rear and have no complaints. 2 years ago I rode to Olympia (WA) and last year to Yosemite, around 8K miles total, plus my usuall commuting and general riding. Tires look good, no cupping or unusuall wear, still plenty of tread. (Dunlop Elite 3 rear, Dunlop Elite 2 front.) As noted in the literature, at low speeds (<25 - 30 mph) the beads don't distribute through the tire and you can notice the unbalanced condition. I spend very little time under 30 mph, not a problem for me.

I removed all front wheel weights, as I mounted the tire myself in my garage and had no other means of doing a wheel balance with any accuracy. The rear tire was mounted at a shop so I left their balance weights in place. However, my opinion is that I could have removed those weights as well.

Just getting ready to to order some more beads for my '06 Concours for my upcomming ride to California. These things seem to work.

[trbig]

Another thing to mention... if for any reason.. the guys with the tubeless tires... ever have these and have to plug a tire, the plug will probably zing around and smash through those beads causing a horrible bounce. A tire with fix-a-flat and a plug will do the same thing.


Tod

[Jerry]

I am having trouble seeing how this would work.

Yes, it is not intuitive, you have to think through it a bit. The supplier has a pretty good explanation at http://www.innovativebalancing.com/HowItWorks.htm

[Big Daddy Funk]

If I had paid more attention in science class....

Well to be honest, I don't get it either. But I like the idea of no outside wheel weights and and I especially like the idea that the wheel can adjust for speed variances and probably some road conditions.(if I am understanding the science correctly) I find traditional wheel weights seldom work well at all speeds. There always seems to be some speed that it's out a bit.
It would seem that you guys who have tried it are happy with it, so thats good enough for me. Thanks for the recommendation.
I'm due for new tires later this season so I'm going to try this stuff before I change tires to see how it works. If okay, I'll use it inside the new tires as well. If not I'll just toss it and go back to weights.
I'll let you know how I made out with it. Thx Rick

[rpgoerlich]

I had picked up a couple 1oz and 2oz bags of Dyna Beads a few years ago from a local Harley repair shop.
I installed them on an 80 XJ650 Maxim when I put new tires on, Dunlap D404's. After 4kmi I had no balance problems. I've since sold that bike.
I installed them in my 77 XS750 when I put a new set of Bridsgstone S11 Spitfires on. Their coming up on 2500mi on them. Smooth all the way up to 100mph.

I installed a new set of S11's on the 80 XS11 I have last weekend, but took the time to balance them in the garage as I had some weights available to use. We'll see how it goes tomorrow as I'm gonna ride it to work for it's first good run...

[cueball]

Don"t know about beads, have been getting steer tyres on trucks done with bags of bright pink powder for about 4 years now. No dramas at all other than the first time. No one told me that when the tyre warms up, the bag will explode with rather loud noise. Near filled undies / held firm grip on wheel till realised what caused noise.

[egleaves]

The way I am understanding the physics behind these beads is that they act as a dynamic dampener, rather than a static counterweight. For the most part I grasp the concept of how the beads migrate to counter-act an out of balance condition.

What I'm wondering now is how these beads react to bumps in the road. When you hit a bump the wheel suddenly accelerates in one direction, and then back in the opposite direction. It seems to me that the beads would react to the sudden changes in force by collecting in the part of the tire opposite to the direction of suspension travel. Would this affect suspension performance? For the better, or worse? Maybe it all happens so fast that the meatbag behind the handle bars doesn't even notice anything different. I may be splitting hairs here, I'm just pondering out loud.

[81xsproject]

Maybe I can help in this discussion. I have purchased and used them. THEY DONT WORK.