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I've used them, or something similar. Just make sure the valve isn't on the bottom if you need to deflate the tire. You'll have those things everywhere.
 

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Here's some of the advantages to Dyna Beads®
  • Increased tire life
  • Eliminate tire vibration
  • Eliminate tire hopping
  • Eliminate tire cupping
  • Eliminate "clumping" problems .
  • Totally Lead-Free product!
  • No weights to corrode or damage expensive rims
  • No dusty, messy powders to deal with.
  • No rebalancing required
  • Reusable
  • Saves you money by extending tire life!
  • Saves you money by eliminating rebalancing!
Properly balanced tires run cooler, place less stress on suspension components, and can even increase fuel mileage.
Non off this ^ is true. Better use some wheel weight.
It's not good to have something lose in your tire.
It will wear the inside off your tire and you are best off not using it.
 

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i don't see how these will wear out my tire
I don't trust it. It's your choice. They also say that you can not use it on a racing tyre bacause it's to soft, every sport tyre got a soft inner liner and it's really soft when it's hot.
Can I use Dyna Beads for motorcycle road racing?
No. The inner liner compound of motorcycle road racing tires is too soft to allow Dyna Beads to perform properly.
Something lose in the tyre can not solve a balancing problem.
what about this stuff?:

this is "loose" in the tire and haven't heard of any balancing problems.
When you read the manuel off those products most say that you need to replace the tyre when you use it.
This is from their site http://www.slime.com/category_3_Tire-Sealant.html:
 

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Discussion Starter · #9 ·
I don't trust it. It's your choice. They also say that you can not use it on a racing tyre bacause it's to soft, every sport tyre got a soft inner liner and it's really soft when it's hot.




When you read the manuel off those products most say that you need to replace the tyre when you use it. This is from their site:
good points. that's why i'm asking. :)
 

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I've done tires for probably 3 years or so, dually tires are usually 8 or 10 ply, they never balance worth a crap in the front but the springs are so heavy you can't feel it, and I've mounted tires that were off by 12oz for the back and you can't feel it at 60+mph.



Also tire beads do not work, golfballs in the tires do not work, pouring water inside does not work...why? because none of those things knows where the light or heavy spots are in the tire/wheel and have no way of staying in that spot while moving...simple as that, if it were then every pro racer on earth would be using this stuff...this stuff will just get you laughed at if you ask a professional about it.
 

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Discussion Starter · #12 ·
Also tire beads do not work, golfballs in the tires do not work, pouring water inside does not work...why? because none of those things knows where the light or heavy spots are in the tire/wheel and have no way of staying in that spot while moving...simple as that,
why not?
i have my doubts about it. but then again, i'm not educated enough to disprove it.
it's easy to say something won't work cause it sounds stupid or too simple or whatever.
i need some proof. and google has yielded nothing :(
 

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Think about it. You've got bunches of loose beads in the tire. How will they find their way to the light spots? If they do find their way to the right place, what keeps them there?

An out of balance tire doesn't act the same way all the time. Depending on the spring rate, damping and amount of out of balance, the tire could be trying to lift off the road when the heavy spot it at the bottom. Resonance is funny like that.

What prevents the beads from collecting exactly at the heavy spot? Nothing. What prevents them from sticking to the soft rubber lining when the tire heats up?

These things appear and disappear over the years. If they worked they would be used by everyone.
 

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Discussion Starter · #14 ·
These things appear and disappear over the years. If they worked they would be used by everyone.
i agree that "doo-dads" and fads come and go. but something could work perfectly well
and take time to become wide spread because of negative opinions and lack of education.
not saying that's the the case with dyna beads, just sayin'.

there are earlier versions of the dyna beads made of glass and steel then teflon coated steel. i don't know the service history of these products either. but i am aware of their existence.
 

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Just because I don't understand how they work does not mean that they don't nor that the hand of god is involved.

I have no intention of using them, especially in a bike, nor do I advocate for them.

Let's assume for a moment that they _do_ have an observable balancing effect. Andy, I bet you could think of a couple ways they might work. I think you've had more physics training then me but here's three ideas to start:

1) Entropy: The only state in which the stupid balls are not bouncing around in the tire at a million miles an hour is a balanced state. Once this state was achieved, by random motion, they would remain in that state.

2) Elliptical movement: Clearly (by definition, I suppose), an unbalanced tire is not spinning in a perfect circle- any point would appear an ellipse as the imbalance pulls the suspension up and down (but interestingly, not front or rear). In effect, the radius and there fore centripetal force would be different at different points in the tire and could therefore those points with the largest radius would accumulate balls. This is complicated as the suspension doesn't really move front-back and there is the road interacting with the radius. Also, I keep thinking that the largest radius would be the heavy spot so either I have it wrong or it is not this theory.

3) Damping: Maybe they are not balancing it at all but just damping the vibrations. I doubt this is the case considering the relatively small weight of the balls compared to the tire but again- not a physicist.
 

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I know a few people in the tire industry & one friend in particular has stated that he won't go near those things... and he manually mounts & balances 1000's of tires a year.
 

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Discussion Starter · #17 ·
Also, I keep thinking that the largest radius would be the heavy spot so either I have it wrong or it is not this theory.

3) Damping: Maybe they are not balancing it at all but just damping the vibrations. I doubt this is the case considering the relatively small weight of the balls compared to the tire but again- not a physicist.
i was also thinking that the heavy spot is where these things would go. but then they would make things worse! that made sense to me too. that's one of the reasons i asked about them.

a damping effect also seems kinda possible. but the websites recommendations are 1oz front
wheel and 2oz rear wheel. i think you're right about that not being enough to dampen vibrations.
 
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I suspect they include such warnings mostly to avoid liability.




I don't trust it. It's your choice. They also say that you can not use it on a racing tyre bacause it's to soft, every sport tyre got a soft inner liner and it's really soft when it's hot.


Something lose in the tyre can not solve a balancing problem.

When you read the manuel off those products most say that you need to replace the tyre when you use it.
This is from their site http://www.slime.com/category_3_Tire-Sealant.html:
 
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I've heard of Dyna Beads, but never known anyone to use them. I've also wondered about other products like Tireballs and Rhinotires. Probably just gimmick crap, otherwise tire manufacturers would be including such products and new vehicles would come with it.
 

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I was skeptical myself. After reading the hype on the different bead "manufacturer" web-sites, it sounds good. Then you read stuff like the guy who put a bead balanced tire on a spin balancer and it always read un-balanced.

The weights on the inside of my truck's wheel got scraped off. (probably mud, stones, etc on the inside of the rim and catching on the brake caliper) Not wanting to pay (and wait) for another balance job, I unscrewed the valve core and poured in about 8 ounces of #9 bird shot. (didn't want to pay and wait for the tire beads) It was a bit of a PIA because you had to go very slowly or the stem would clog. Next time I'll break the bead.

It seemed to work so I put a couple ounces in each motorcycle tire. A 25 pound bag was about 30 bucks. I can do a lot of tires and still have a few "beanbag" weights for holding things down in the workshop.
 
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