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Thread: Dyna Beads? Dynamite!

  1. #1
    crgrbrts
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    Dyna Beads? Dynamite!

    I had a new Metzeler Lasertec front tire installed last week in preparation for a couple of long, cross country journeys on my K75S. The new tire cured a slight high speed shimmy, but introduced a small but annoying front end hop.

    I suspected a bit of tire unbalance. However, taking the bike back to my dealer for corrective rebalancing was less than convenient. He's some miles away and his service department is very busy. At least half a day would have been involved in the service.

    So, I investigated the idea of "dynamic balancing" using a user-applied substance inside the tire. I found a website (www.innovativebalancing.com) advertising a product called Dyna Beads. What I read about the product was encouraging, so I ordered a one-ounce package of the miniscule ceramic beads.

    They arrived today - two days after ordered - with an application kit (a little plastic bottle and a tube). The drill is simple: unscrew the valve stem core from the tire to be treated - which deflates it, of course - screw the plastic applicator tube onto the open valve stem, fill the little bottle with the ceramic Dyna Beads and very, very sl-o--o-o-owly pour the beads through the tube and into the tire. Then, re-insert the valve stem core (or, better yet, install a filtered core also sold by the vendor), and re-inflate the tire.

    The results are astounding. Frankly, I thought the testimonials on the Innovative Balancing website were wildly hyperbolic, but I was wrong. The front end of my old bike is now rock solid at all speeds. The front tire feels like a racing slick and cornering is now quick and sure to an unprecedented degree. All hint of hop or wobble is gone completely. With this type of balancing, I can't believe the modest Metzeler could be bested by any other tire.

    I've just ordered another pack of Dyna Beads for my rear tire and can't wait to pour them in. Wow!

  2. #2
    Club President gsjay's Avatar
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    wasn't this item just featured in one of the cycle magazines?

    I've looked through the pile and can't find the article.

    sounds like a neat product. I have a yamaha GTS 1000 w/ swingarm front suspension and it's always difficult to get the front tire balanced.

    jason
    Jason Kaplitz
    Johnstown, Pa
    Laurel Highlands BMW Riders #294

  3. #3
    A bozo on the bus deilenberger's Avatar
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    I've always had a bit of a problem accepting the dynamic balancing ideas like this (which have been around almost since the inflatable tire was invented..) since it has this flaw (IMHO) - while it may balance after some number of rotations - every time you stop the rotation - it goes out of balance, and much quicker than it goes back into balance. It only has to stop for a second and all the balance medium drops to the bottom of the tire. This then results in a more out of balance tire than one with no dynamic balance stuff in it - which has to rotate a number of times (as they show in their nice PDF) in order to achieve balance again.

    They even make mention on their website of it being hard to check the balance on dynamic wheel balancers that don't spin the tire long enough to achieve balance.

    It would seem in any sort of urban environment - the net result would be a negative.

    To the OP - I'd suggest that if your dealer can't balance your tire well enough that you don't have the front end hop - you seek a motorcycle tire dealer with better equipment, and/or better trained employees, or turn that tire in as being defective. I've never had a tire that couldn't be properly balanced given someone with some pride in their work and a decent (Snap-On makes a good dynamic spin balancer for bikes) balancer. All it takes is time, skill and the desire to do it right.

    YMMV.. and probably will.
    Don Eilenberger http://www.eilenberger.net
    Spring Lk Heights NJ NJ Shore BMW Riders
    '12 R1200R - I love this bike!

  4. #4
    dlearl476
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    Don, you worry too much. Tire balance at any speed under 30 doesn't mean squat. I've ridden bikes with knobbies that were so unbalanced any speed above 50 was like riding the horse out front of the grocery store (remember those? That era is what you call the "pre-litigious period"! OTOH, city riding was cake.
    I'm no scientist, and thank God I didn't have to stay at a holiday inn last night, but I think the speeds at which balance is critical for tire wear and motocycle handling are 50+, by which time the dynabeads would be working their magic.

    I'm going to try them.

    Then again, being such a tool slut, maybe I'll go with a Marc Parnes balancer with all the fixin's.

  5. #5
    scqtt
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    Quote Originally Posted by gsjay View Post
    I have a yamaha GTS 1000
    Jason

    That is a way way cool bike!

  6. #6
    I'm curious as to how these beads would balance a tire. It would seem that they would migrate to the spot farthest from the center of rotation, which unfortunatlely, is already the heavy spot. Why wouldn't they respond to centrifugal force in the conventional way?

  7. #7
    BeemerBoy terham's Avatar
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    Quote Originally Posted by gsjay View Post
    wasn't this item just featured in one of the cycle magazines?

    jason
    They were written up in the current Owner's News.
    Terence
    R75/5 R100RS K100RS R1150RT
    My Smugmug

  8. #8
    Club President gsjay's Avatar
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    they work

    I installed new tires yesterday on my GTS 1000 and used the Dyna beads.

    They get my YES vote.......

    Best this front end has been in many years! Shimmy is all but gone.

    I'd say if you're having issues they're worth a try.

    jason
    Jason Kaplitz
    Johnstown, Pa
    Laurel Highlands BMW Riders #294

  9. #9
    crgrbrts
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    Don's got a point.

    I understand Don's theory but, in practice, the results of dynamic balancing appear differently. The weight of the Dyna Beads is one ounce so the out of balance situation at low speeds is negligible -- I can't feel it at all. The weight of the individual beads is so miniscule that they begin to distribute themselves at any speed -- perhaps not evenly, but well enough. The effect at higher speeds is dramatic. The Dyna Beads seem to add a measure of stability that I haven't felt from even the most carefully balanced tires using the traditional lead weight method.

    Don is right, though. The tire mechanic should have done a better job. The reason I did not return for a correction was one of convenience. My dealer is some miles away through obscenely congested Washington, DC area traffic. The trip during business hours can be arduous unless a back route is taken. A back route, while somewhat bucolic and pleasant, adds too much time during working hours. Once at the dealer, one must wait, and wait, and wait for service. These mechanics are good -- very good -- and demand is great, so they're booked for weeks in advance. Even "squeezing in" a regular customer like me can take a couple of hours or more. So, I opted for the online ordering, home delivery, DIY approach.

    Going to the dealer will be fine after I retire :-)

  10. #10
    Maine Rider cayuse60's Avatar
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    Thumbs up

    Changed my rear tire last week, removed the old balance weights and added one once of beads...no issues up through 80 mph
    Tim
    1997 K1100 LT
    " If you don't know where you are going, any road will get you there." And that is OK with me

  11. #11
    crgrbrts
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    "...no issues up through 80 mph"

    Yeah, THEN what happens?

  12. #12
    RIDERR1150GSADV
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    Talking

    like to hear more about these beads

  13. #13
    Maine Rider cayuse60's Avatar
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    Quote Originally Posted by crgrbrts View Post
    "...no issues up through 80 mph"

    Yeah, THEN what happens?
    SMOOOOTH...
    Tim
    1997 K1100 LT
    " If you don't know where you are going, any road will get you there." And that is OK with me

  14. #14
    Rally Rat
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    Where's the physics?

    I'm really tempted by the Dynabeads but don't understand the logic and can't find the explanation on the website. How is it that these beads congregate near the light side of the tire? How is wheel balance really effected by these beads...or by anything else of this type loose in the tires?

  15. #15
    Quote Originally Posted by hcmiller52 View Post
    I'm really tempted by the Dynabeads but don't understand the logic and can't find the explanation on the website. How is it that these beads congregate near the light side of the tire? How is wheel balance really effected by these beads...or by anything else of this type loose in the tires?
    If you go to their website I recall there being an explanation of how it works. The only place anywhere near me that will change a tire that I bought elsewhere charged me $40 and messed up my newly refinished wheel a little doing it. After that experience I bought a tire changing rig from Harbor Freight and will be balancing with Dyna Beads the next time I need a new tire.
    1990 K75s

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