| Author | Message | ||
     Natexlh1000 |
the inside of a tire typically has ridges too. wouldn't that interfere with the beads' ability to move about and settle? I saw a demo with a wheelbarrow wheel mounted to an electric motor with a channel holding several large steel ball bearings instead of dynabeads. it was really cool but I can't find it now as I am on the toyphone. the experiment used a strobe to freeze the wheel so you could see them settle out. they then added a large weight like a hammer head and this time the bearings settled out opposite the weight. it was really cool! the real question I have is if those tiny beads weigh enough to do anything to a wheel good or bad. | ||
| Glitch |
the real question I have is if those tiny beads weigh enough to do anything to a wheel good or bad. There is no way dyna beads are gonna compensate for hammer. | ||
| Sifo |
the inside of a tire typically has ridges too. I've heard ridges can be a good thing when a snake is going in or out of it's hole.  | ||
| Spiderman |
I put the beads in my tire but it felt weird???  | ||
| Sifo |
Bead snakes?  | ||
| Etennuly |
Let me be the first to introduce OKRA to this thread! | ||
| Oddball |
Those aren't for the tires. They're junk to pack in your back seater's 'trunk'. And with that handle they work as a pull starter. Just yank it out quickly and listen to all the noise she'll make.    | ||
| Billyo |
natexlh1000-Is this the video? http://www.youtube.com/watch?v=skY6qvzpNXI&feature =related | ||
| Sifo |
Interesting video. I have a few comments though. You can see vibration on the mount just under the tire. Very little vibration showed up with the tire "balanced" There was a fair amount of vibration that you could see with the balancer in place. It did get rid of a lot of the imbalance that they added with the magnet though. Another question, why does the maker of DynaBeads say that they wont work on a balancer? That video basically showed it working on a balancer. Strange. One last thing, I wonder how the tire flexing where it is on the ground is going to affect the beads in the tire. I would think they would get bounced every revolution of the wheel. Maybe they just settle right back in place and really doesn't matter. | ||
| Nevrenuf |
boy i hope you go back to work soon spidey. that is just not right.  | ||
| Spiderman |
The pay sucks but the hours are great  | ||
| Natexlh1000 |
That was the video I was talking about alright. I think there was a series. Also, you can see that the motor-tire thing is not bolted down and may even be mounted on rubber feet. The actual video I saw was a bit longer and showed the balls in a balanced tire organize themselves almost perfectly around the perimeter. Then he messed it up with the magnet or something. they arrayed themselves as you see in that video. | ||
| Natexlh1000 |
This is the video I remember: http://www.youtube.com/watch?v=y-XHfrIGvoI It's been recompressed to be sucky though. The questions I still have: 1)How bad does a wheel have to get before you notice it? 2)do those tiny beads work as well as the huge ball bearings in the demo? I think I should get some wheel weights and see how much is needed before my ULY is sucky on the highway. That would at least answer the first question | ||
| Billyo |
That's not a bad idea. The guy at the tire store gave me a whole strip of weights. It's supposed to rain here tomorrow so maybe I'll try it on Thursday. My Uly has no weights or beads so it would be a good test mule. Cool tree swing! | ||
| Littlebuggles |
Not to rain on the parade, but didn't we talk about this last year? It was shot down by several dudes here that seem to know a lot... ...just sayin'... how wrong is it that I had that same thought Spidey? | ||
| Fresnobuell |
My mates and I have changed so many tires that I can safely say there are variances even in top of the line sport tires. Now I can't say how much a tire/wheel can be out of balance before the rider can feel it. Once we took off 8 weights a 190 rear tire and ran it up to 90mph...rider said he couldn't feel any difference. It was an IL4 so the engine wasn't masking possible vibes like a Twin might. | ||
| Glitch |
Not to rain on the parade, but didn't we talk about this last year? At least once a year each year I've been here. Good one Spidey. | ||
| Littlebuggles |
No wonder it seems so familiar, and I've probably skipped reading it a couple of those years! Well, thanks for the info guys, I'll just keep having my tires done in the traditional manner then. | ||
| Fast1075 |
Had a new Corsa III mounted yesterday...it needed ZERO weight... | ||
| Billyo |
I just got back from another test. One ounce on the front tire of the Uly was barely noticible but it was there. Two ounces was only slightly more so. After about thirty miles I took the two ounces off and definitely noticed how smooth it was again. | ||
| Sifo |
So two ounces should be a recognizable difference. Any DynaBead users want to test this theory out? I have a theory on all of this. I think the beads will work within certain limits. It takes an out of balance situation to move the beads. As the wheel gets close to balance the beads will be less and less motivated by the forces involved to further balance the wheel, never really getting the wheel perfectly balanced. Basically it gets it good enough for 90% of street riders where they will not ever notice an out of balance condition. I'm guessing that the dynamic balance machines are more sensitive than what we feel while riding. This would explain why they claim that a balance machine won't confirm that they work. This would also explain what we saw in the video. The balanced tire ran quite smooth. Unbalancing the wheel with the magnet took it way out of balance. Adding their dynamic balance system balanced it much better, but it wasn't quite as smooth as the original balance wheel. My take is that the probably mostly work good enough for most people. Personally I'll still let my shop balance the wheel with weights when putting on new tires.  | ||
| Mr_grumpy |
So they're..... wait for it..... Dyna might beads. Thank you, thank you, you've been a great audience , I'll be back next millenium. | ||
| Crusty |
I bet you really got a bang out of that!!! | ||
| Blake |
The beads may damp vibration due to imbalance. No way they balance the tire/wheel. Damping versus balancing are two completely different mechanisms relating to rotating wheels/tires. Both reduce or eliminate problematic vibration. Only one promotes even tire wear and tire longevity, the one that actually balances the wheel/tire assembly. | ||
| Easy_rider |
I really don't want to support the beads (except for the ones Spidey is using in his spare time) but if the beads move to a point where they dampen vibration, then they have balanced the wheel/tire assembly. | ||
| Sifo |
Will a user of the beads (not Spidey!) just add a couple of ounces of weight to their wheel and see if the wheel feels balanced. This is the last step of an experiment to see if they work. | ||
| Arcticktm |
The suspension components will help "dampen" the vibration, but they do not "balance" anything. To add some more to the discussion about how much out of balance you can typically feel: Just put on a new Roadsmart rear. Shops spin balancer would not fit the Buell rear wheel, so they did not balance it. I removed the existing weights (3 oz) and rode the bike about 50 miles up to 100 mph max. No noticeable vibration. Very smooth. Borrowed a nice static balance setup and removed the wheel last night. Was not far out at all, but there was a heavy spot. I ended up putting 1/2 oz on not far from where the 3 oz had been for the previous tire setup. It's possible I could use a little more, but it is definitely less than 1 oz out, and felt perfectly smooth with no balance weights. I'll keep the 1/2 oz on just in case it will help even out tire wear. | ||
| Blake |
"if the beads move to a point where they dampen vibration, then they have balanced the wheel/tire assembly." No idea how you conclude that. You could mount them to the fork lower and they could damp vibration just as well. How would that balance the wheel/tire? | ||
| Blake |
Sifo, That isn't a last step to see if they work, it's pure anecdotal observation. Damping vibration is not proof of balance. It is merely proof of vibration damping. It's incredible what some will believe, that if you pour some beads into a tire they will magically balance the tire/wheel assembly. Really, is there anything in physics that behaves similarly. It's no different than the mercury filled crankshaft "balancers". They too fail to balance, they are simply vibration dampers. Nothing more. They treat the symptom of an imbalance, (the vibration), not the cause, (the imbalance). Balancing the wheel/tire addresses the root cause. | ||
| Froggy |
My HVMP bar ends dampen the vibrations I feel in the handlebar, does that mean it balances the bars? |
