dyna beads... update?

[Dennis]

I can say I've had a few tires over the years that vibrated badly without weights. I always balance them now.
We use a Redline stands balancer and stick on weights.
I asked the question about dynabeads last year too, and I won't be trying them.

It would be interesting to put the beads in one of these tires that is out of balance. I've never had one bad enough to feel. Our NoMar balancer looks to be very similar to yours.

As for lasting the life of the tire, who here rebalances their motorcycle tire half way through the life and what kind of tires are you buying? How do the beads stay in the right spot as I'm accelerating from 0 to 160 mph in 8 seconds? Seems they would never stabilize. Steady state, sure but not in my race.

 

[BIKE DUDE]

Although I have never used them on my bikes, I have used them for over 20 years in all my tool truck tires with perfect results and will never use anything else for the truck. The only draw back that I can see for bikes is the frequency of tire changes and the resulting mess of beads falling out on each change.

 

[sixpack577]

It would be interesting to put the beads in one of these tires that is out of balance. I've never had one bad enough to feel. Our NoMar balancer looks to be very similar to yours.

As for lasting the life of the tire, who here rebalances their motorcycle tire half way through the life and what kind of tires are you buying? How do the beads stay in the right spot as I'm accelerating from 0 to 160 mph in 8 seconds? Seems they would never stabilize. Steady state, sure but not in my race.

I'de like to try them in an unbalanced tire too, just for a comparison. I'm happpy with stick on weights though.
Balancer belongs to my friend and we haven't seen a tire that didn't need a weight in many sets(do alot of bikes).
TufBusa made a good point to me when I asked about them too. I ride alot of long wheelies. He said "what happens when your front tire stops spinning and you set the front down?" Do you then have a sudden vibration at 100+mph?
Very possibly.
I can't comment on dyna beads as I've never tried them. They are too expensive and have enough negative reveiws from members here whose opinions I value. I have a free balancer and all the weights I want anyway, and another friend machine mouts them for us.

 

[Tufbusa]

If dyna beads were the trick option to balancing tires every professional racer would be using them. Any aftermarket product that no high speed professional will use should answer all your questions. You can always learn what works and what doesn't by hanging around the race track. If it's out there, some cheap a$$ racer has tried it

.....To say that an aftermarket product does not function properly because it is not used by the racing community is a far to narrow a definition to determine a products worth. Centerstand, heated clothing, touring windshield, cruise control etc etc. ...cheers ken

You missed the point!

 

[Dennis]

I'de like to try them in an unbalanced tire too, just for a comparison. I'm happpy with stick on weights though.
Balancer belongs to my friend and we haven't seen a tire that didn't need a weight in many sets(do alot of bikes).
TufBusa made a good point to me when I asked about them too. I ride alot of long wheelies. He said "what happens when your front tire stops spinning and you set the front down?" Do you then have a sudden vibration at 100+mph?
Very possibly.
I can't comment on dyna beads as I've never tried them. They are too expensive and have enough negative reveiws from members here whose opinions I value. I have a free balancer and all the weights I want anyway, and another friend machine mouts them for us.

I've had tires that didn't need a weight, but really my point is if you hopped on my bike you would you be able to tell if I balanced the tires or not? I say in most cases not so the whole discussion is mute.

 

[sixpack577]

I've had tires that didn't need a weight, but really my point is if you hopped on my bike you would you be able to tell if I balanced the tires or not? I say in most cases not so the whole discussion is mute.

I say most likely. Of course every tire is different, but I've ridden unbalanced tires on several bikes over the years. Some are fine, and others are unsafe. They shake and vibrate at various speeeds, some smooth out, some become worse.
When you're leaned over in a 100mph curve and the tire is shaking from being out of balance, that's never good.
There are circumstances when it most certainly makes a noticeble difference.

 

[lankeeyankee]

Ive never heard any complain about a properly wheel weighted balanced tire, but I have heard mixed reviews over the years about Dynabeads from people who have tried them. So that being said with my luck I will stick with the wheel weight balancing technique that has been proven 100%
The onlyway I could see using them is if I lived in Bumbfuk Egypt hundreds of miles away from a tire shop

 

[Tufbusa]

Tuf and GixerHp I think dyna beads aren't used at the track because it's as he mentioned, they are too difficult to install and with changing tires all the times it would be a hassle. There seems to be a lot of folks like yourselves against them but with no real proof or stories saying why they don't work.
No offense but is yalls affinity toward dyna beads based on your religious upbringing



Seriously though other than pita installation why are you two against them?

You are grasping at straws my friend. I could care less how or if you or anyone else chooses to balance his/her tires!

All I'm sharing is how to tell what works best in the world of performance riding and dyna beads are not included in that list. Which by the way, means little to the rider who hasn't advanced past the stage of twisting the throttle and hanging on with a death grip!

If you remain in doubt, take a trip to the track and ask any rider with a single digit plate number if he would consider using dyna beads to balance his tires.

 

[RussellJ]

Please make sure they are not chinese dyna beads!

I am sure they are super junk!

 

[card16969]

No kidding.

We have been arguing about Dyna Beads for years. I can recall doing this same exact thread 3-4 years ago with the exact same comments. The only people that say they don't work and are those that have never tried them. Go figure.

Let's do devils advocate. If 1000 riders tried them for the first time, and they did not work. What would happen? Those 1000 guys would not use them anymore, and tell their buddies they suck. It's just that simple. That didn't happen. Instead, Dyna Beads made converts out those 1000 riders.

All you that have not tried them, try it for one tire change and see if you notice any difference.

Then you can post they don't work.

Pashnit thats what i figured.. alot of people dont want to go away from old ways of thinking just like how some people didnt want to go to fuel injection from carburation thinking that it would never work right and be less dependable and well look at vehicles now.... on another note do you carry these in bulk... my father and i have several bikes and vehicles and would possibly be interested in running them on everything. Once were done restoring the last of the bikes and cars we will have 9 bikes and 8 cars/trucks and if these work would be interested in running them on everything since we change our own tires.

 

[card16969]

Well I guess I am one of the few that have actually tried them and don't like them. I currently have them in my Daytona 1200 and they will not be replaced when I change tires this season. They are a little bouncy when I first take off, that's of no concern to me. It seems that after 20ish miles they start to cause an imbalance which only gets worse until I stop and start again. I frequently go for rides that use a full tank without stopping. The Triumph is also a heavy, smooth sportbike and I only run with quality tires so it's very similar to the Busa. I did not put them in my Busa tires after my experience last season with the Triumph. YMMV but they are not for me.

Ok now heres a question for you as your problem sounds like something else... have you checked your direction of rotation on your tire and rim because your bouncing/imbalance after 20mph sounds like your tires are mounted incorrectly. No im not saying you dont know what your doing just an observation of a common problem.

 

[card16969]

I'de like to try them in an unbalanced tire too, just for a comparison. I'm happpy with stick on weights though.
Balancer belongs to my friend and we haven't seen a tire that didn't need a weight in many sets(do alot of bikes).
TufBusa made a good point to me when I asked about them too. I ride alot of long wheelies. He said "what happens when your front tire stops spinning and you set the front down?" Do you then have a sudden vibration at 100+mph?
Very possibly.
I can't comment on dyna beads as I've never tried them. They are too expensive and have enough negative reveiws from members here whose opinions I value. I have a free balancer and all the weights I want anyway, and another friend machine mouts them for us.

Most of the people that i see against them have never even used them and in many other products in the world there are many doubters just like how im sure there are ups and downs of these. I balance my own wheels as i have my own coats 220 tire machine and a balancer and have changed and balanced more tires than i care to count, its not that i dont want to use weights or that i dont think that they work but weights have been around for years and just like any product there is always an upgrade somewhere down the road. Every person has a tendency to get over on one side of a tire more than the other which in time would throw a tire out of balance with wear and like yourself you like to ride wheelies, well every time you set that front wheel down you are creating a wear spot on that tire which throws it out of balance. If theres a product that can put your tire back into balance when you do so and make the balance of that tire correct as you ride wouldnt that make it a safer ride? ... and any weights on there that are hard mounted could actually throw your tire further into unbalance and making it ride worse correct?

 

[Dennis]

Can anybody explain the rotational dynamic theory behind how these perform in the transient condition?

 

[card16969]

You are grasping at straws my friend. I could care less how or if you or anyone else chooses to balance his/her tires!

All I'm sharing is how to tell what works best in the world of performance riding and dyna beads are not included in that list. Which by the way, means little to the rider who hasn't advanced past the stage of twisting the throttle and hanging on with a death grip!

If you remain in doubt, take a trip to the track and ask any rider with a single digit plate number if he would consider using dyna beads to balance his tires.

You CANNOT base every product off of whether or not a racer would use them, as i stated i talked to a friend who worked on an actual superbike team and the reason that they dont use them is practicality but yet several of the crew members use them personally. Thats like asking asking a sniper why he doesnt go deer hunting with a 50 cal. since he uses one every day at work. There are ALOT of products that work but doesnt mean they are appropiate for all purposes and applications.

 

[card16969]

Can anybody explain the rotational dynamic theory behind how these perform in the transient condition?

As a inbalanced tire rotates the heavy spot will heave a tire to one side and as that forward motion is achieved whatever free weight that can move moves in the oposing direction (every action has an equal and opposite reaction)... same as a actual tire weight oposes the heavy spot in a tire to balance it evenly the beads constantly oppose that heavy spot ... or atleast thats how i figure it.

 

[kromdom]

Please make sure they are not chinese dyna beads!

guess we can call them CHYNA beads? ???

 

[Dennis]

As a inbalanced tire rotates the heavy spot will heave a tire to one side and as that forward motion is achieved whatever free weight that can move moves in the oposing direction (every action has an equal and opposite reaction)... same as a actual tire weight oposes the heavy spot in a tire to balance it evenly the beads constantly oppose that heavy spot ... or atleast thats how i figure it.

That explains steady state to me. Similar to how a tire can spin on the pavement when accelerating too hard, the beads would seem to be always searching for the right spot and never getting there during heavy accleration.

Edit: The beads have mass, so the acceleration will tend to leave them behind.

 

[card16969]

That explains steady state to me. Similar to how a tire can spin on the pavement when accelerating too hard, the beads would seem to be always searching for the right spot and never getting there during heavy accleration.

Edit: The beads have mass, so the acceleration will tend to leave them behind.

To my understanding steady state would be the beads going to the outermost space from the center of rotation being the axle the same as the toys that attach to the spokes of a childs bicycle that slide from the center out on the spokes as the tire spins caused by constant rotation. And rotational dynamic is as the heavy spot on the tire is in one side of the wheel the beads oppose the force of it in the exact opposite direction caused by the oposing pull of the forward heaving motion of an inbalance... the same motion that causes wheel hobble or hop.

 

[mr8ball]

I put them in mine last time I changed my tires and have to say I have had not issues with them at all. I have been 80 to 90 + qiute a few times and have not noticed any shake at all. I will be using them from now own

 

[AJAY]

There are several poster here (whom I respect greatly) that are negative on Dynabeads when they have no personal experience using the product. I will respectfully disagree with them.

I have used the product on two bikes, and now my neighbor is using them. They work great! Very easy to use compared to static balancing on a stand. They are the smoothest balance I can imagine.

Dynabeads are a little more expensive. I will use them on any bike I intend to keep. They are that much better.

Dynabeads would be a pain in the butt if you changed tires often. I think card16969 has given the best reason why racers do not use this product.

I talked to a buddy who worked on a superbike team and the reason why they dont use any type of internal balancing media is because a tire is never on the rim for more than a week and thats having 15-20 tires on the rack and the media is too much of a hassle to change out that often so weights are easier.

But for street riders who change tires every year (or five), Dynabeads are a great way to go.