Topic: Dyna beads evaluation

[scottly]

The Centramatic video is not a demonstration of dyna beads; apples and oranges. Regarding the Centramatic demonstration, pay close attention to the movement of the bolt head directly below the tire. Look at the movement at around 30 seconds with the control tire, and again at 3 minutes with the balancer, with the extra weight removed.

[CoachDoc]

The Centramatic video is not a demonstration of dyna beads; apples and oranges. Regarding the Centramatic demonstration, pay close attention to the movement of the bolt head directly below the tire. Look at the movement at around 30 seconds with the control tire, and again at 3 minutes with the balancer, with the extra weight removed.

I would have to say a more apt comparison would be big apples and small apples.

[Gordon]

You think.? He appears to touch the wheel in the demo with absolutely no movement of the finger to suggest rotation....  It looks too still, and it is on the Internet....

I don't see the finger touching the wheel, but I agree it's a good idea to approach most things on the internet with skepticism.  However, when my brother and I were kids we had an adjustable strobe light and we spent many evenings playing with it and setting it so it would make the ceiling fan, or box fan, or any other fast-rotating thing look like it was sitting motionless.  It's just a matter of setting the frequency to match the rpm.  If a couple of kids can do it I don't see why anybody else can't. 

[Retro Rocket]

The Centramatic video is not a demonstration of dyna beads; apples and oranges. Regarding the Centramatic demonstration, pay close attention to the movement of the bolt head directly below the tire. Look at the movement at around 30 seconds with the control tire, and again at 3 minutes with the balancer, with the extra weight removed.

Actually, after looking at that video a number of times, that wheel is far from balanced....

[scottly]

It looks to me like they triggered the strobe off the wheel, just like a timing light. That's why it looks perfectly motionless.

[Spanner 1]

Two things about that Centramatic video....... the operator may have run the wheel up to a 'sweet spot' RPM while testing with the strobe to find an RPM that the beads  happen to be on the opposite side of the wheel to the weight ( magnet ) and at that kind of RPM a truck tire would be part of a rig doing over 100 mph, maybe 130 mph IMO.....
Oh, and a third thing... the mass of the magnet is much more and concentrated in a small area on the rim, only 2 beads are contained in the same but opposite (180 deg. )area with a much smaller mass...... any other beads on each side balance each other out = no effect. So wheel not balanced .

[Markcb750]

As further thread drift...Amazing how having access to incredible amounts of "information" has not helped people to make sound decisions about what could be true vs what could not be true. 

What does not amaze me is how prolific snake oil sales are on the internet...

[dave500]

if these things were that good they would be factory fitted on all modern vehicles,,a bit like electronic ignition.

[heffay]

don't forget this video... i think it was posted in the original beads thread. 

DynaBeads demo video

the one thing i'd like to see in that video is before he puts the beads in, take the RPMs up to what he takes them with the beads in.  Before adding the beads he only uses slower RPMs.

[FunJimmy]

don't forget this video... i think it was posted in the original beads thread. 

Holy Cow. This has gotta be the evidence to convince RR!

Poke, poke. LOL

[nancy]

Dave - I don't think you can draw that conclusion. Manufacturers are notorious for NOT fitting sensible and necessary items to their products - especially motorcycles. e.g. how many new bikes roll off the floor with rear "huggers", hi power lighting, tank scratch guards, crash knobs, puncture repair kits? plenty more can be added...
Regards
Mark
PS: beads are not my bag either man...

[dave500]

don't forget this video... i think it was posted in the original beads thread. 

Holy Cow. This has gotta be the evidence to convince RR!

Poke, poke. LOL

going by the drink bottle display if your in the twisties and speeding up and slowing down your getting an unbalance and re balance situation over and over?theres probably an optimum harmonic speed these work at?depending on your wheel and tyre?

[Bluegreen]

I have a feeling these things are not being used on Casey's RC213V.....

[heffay]

don't forget this video... i think it was posted in the original beads thread. 

Holy Cow. This has gotta be the evidence to convince RR!

Poke, poke. LOL

going by the drink bottle display if your in the twisties and speeding up and slowing down your getting an unbalance and re balance situation over and over?theres probably an optimum harmonic speed these work at?depending on your wheel and tyre?

This is why I previously stated that I would use them in conjunction with a regular balance.  These are really only designed for the open road.  Even then, many will argue their effectiveness on the open road.  I won't argue either way UNLESS I'VE TRIED THEM

I put about 150-200 miles a day on my truck, mostly highway miles.  I know exactly how each one of my tires is performing at this point.  I want to add the beads to see if I notice a difference. 

I'd also like anyone with input on this thread to really put it where this mouth is... RUN SOME TESTS... on video, with controls, all scientific like!

[Roach Carver]

why could you not put an out of balance tire on a balance machine. check it, show it. fill it up with the bb's and then recheck it. should it not come up good then? I am talking about the kind that dynamically balance btw.

[Gordon]

 
I'd also like anyone with input on this thread to really put it where this mouth is... RUN SOME TESTS... on video, with controls, all scientific like!

If I put on a lab coat and safety goggles, that makes it "scientific", right?   Bonus points for having a beaker of liquid over a Bunsen burner?

One possible issue I can see is the initial imbalanced when accelerating from a low speed, before the beads have stabilized, and going through that brief period of apparent heightened imbalance. 

I don't have a strong opinion either way on these things, that's just something that came to mind. 

[FuZZie]

 
I'd also like anyone with input on this thread to really put it where this mouth is... RUN SOME TESTS... on video, with controls, all scientific like!

If I put on a lab coat and safety goggles, that makes it "scientific", right?   Bonus points for having a beaker of liquid over a Bunsen burner?

One possible issue I can see is the initial imbalanced when accelerating from a low speed, before the beads have stabilized, and going through that brief period of apparent heightened imbalance. 

I don't have a strong opinion either way on these things, that's just something that came to mind.

On the roads I'm planing for the summer Gordon it has to be balanced all the time and it can't be wearing some place I can't see.

EDIT: sorry mixed up the quote tag placement.

[BobbyR]

Here is my concern since i use a tube in my tire. I am not sure I want little beads slowly having small amounts abraded from the inside of my tube. To be honest I have not had to balance my BT-45s and the bike behaves fine. I am on my second set. My rim is true and i take great care to assure the tube is properly seated.

[Spanner 1]

If everyone demanded beads instead of another television set, then there would be beads.

                                                                                                 - John Bead.

[BeSeeingYou]

I don't really have a position on these Ben Wa Balls but what seems to be missing is some one saying yeah, I tried them and they sucked or made things worse.  You have a few who feel they helped or had a positive impact.  Then you have a whole bunch of people who haven't tried them but have opinions across the whole spectrum from gut feelings to long winded "engineery" posts that make my eyes glaze over.   The only conclusion I come to is agreeing with BobbyR  about being concerned these little beads wearing on my inner tube.  I think they had them in the Hula Hoops when we were kids.  They made that wooshing sound.  Might be cool if they did it on your bike.

The only thing missing so far is a story about a friend's cousin who had them and......

[FuZZie]

Did you notice in the product video that they seemed to need to spin up to speed before they balanced srust58?

[BobbyR]

If everyone demanded beads instead of another television set, then there would be beads.

                                                                                                 - John Bead.

Nicely put.

A man invents a thing which could revolutionize the arts, produce mountains of money, and bless the earth, and who will bother with it or show any interest in it?--and so you are just as poor as you were before. But you invent some worthless thing to amuse yourself with, and would throw it away if let alone, and all of a sudden the whole world makes a snatch for it and out crops a fortune.

- Mark Twain

[BeSeeingYou]

Did you notice in the product video that they seemed to need to spin up to speed before they balanced srust58?

If the video doesn't have nude or at least semi nude chicks in it I can't be bothered to watch.  My gut feeling (for what that's worth)   is that a small imbalance is not critical at slow speed.

[Retro Rocket]

Sure Steve, if that vid had nude women in it you still wouldn't see the damn beads.....

[FuZZie]

Did you notice in the product video that they seemed to need to spin up to speed before they balanced srust58?

If the video doesn't have nude or at least semi nude chicks in it I can't be bothered to watch.  My gut feeling (for what that's worth)   is that a small imbalance is not critical at slow speed.

LOL +1 on the video's but some how i think we have very different roads.