Balancing with Dynabeads...
http://www.innovativebalancing.com/ (http://www.innovativebalancing.com/)
I like this product so much I bought a big bag and put them in my truck tires.
But for motorcycles, one ounce in the front, and two ounces in the rear is sufficient for our tire sizes.
The only hitch with these in Tigers is that they will not flow through 90˚-angled valve stems... you'll need to pour the Dynabeads into the tire before the tire is inflated and the beads are sealed.
For those skeptical of Dynabeads, there is a wealth of informative debate on ADVrider... http://www.advrider.com/forums/search.p ... id=5739762 (http://www.advrider.com/forums/search.php?searchid=5739762)
+1 on Dynabeads. I've been using them on the DR650 with great results. Like Stretch said, they won't "flow" into the Tiger valve stems. :x
I forgot to bring them to the last tire changing party and had to use weights again.
Quote from: "FullMonte"+1 on Dynabeads. I've been using them on the DR650
So they work with tubes then?
Yes, they work with innertubes.
Great timing on the thread.
Stretch are you sure on the one ounce in the front?
Innovative says 2 front 2 rear.
http://www.innovativebalancing.com/char ... cycleChart (http://www.innovativebalancing.com/chart.htm#MotorcycleChart)
Quote80 - 120 mm tire width --- 1 oz
Tigers run 110's.
Snake oil. I've never seen a decent explanation on how the right amount of beads migrates to the light side of the tire.
Quote from: "littlefield"Snake oil. I've never seen a decent explanation on how the right amount of beads migrates to the light side of the tire.
it's physics :)
check it out: http://www.innovativebalancing.com/news.htm
At the bottom there's a "How it Works" link
I used them this weekend on my front tire change out.
I had some odd oscillations on the old tire that came with it. While driving at highway speeds, it tended to oscillate back an forth ever so slightly.
Don't know if it was from the cupping along each side, or a poor balance. New tire could certainly be the solution.
However the dynabeads where incredibly easy, an I love the DIY nature of it, nice not having to hassle with a shop ... The ride today is infinitely more smooth..
Quoted from the Dynabead technical explanation:
So we have our whole wheel and tire rotating around a spot that is slightly off the axle centre, and the part that is farthest away from the new axis of rotation is on the opposite side from the overweight sector. But this is precisely where the beads will roll... to the spot farthest from the axis of rotation.
Anything sound funny about that? Like the farthest away from the axis of rotation is the lightest? Actually this is true if the wheel/spring system has passed through it's first natural frequency. At a frequency lower than that the heavy spot is farthest from the axis of rotation, as is intuitive. As it turns out, for a 30 lb wheel and 2 x .85 kg/mm springs this frequency corresponds to about 30 mph. So the physics makes sense.
Still think I'll stick to the static balancer.
I'm not a physicist. All I know is the Dynabeads work. Bumble bees should not be able to fly given their weight and the size of their wings... but they can fly. Sometimes events take place which can't be explained in a textbook.
Yup, the beads won't go through the 90 degree valve stem on my '06, even using a vibrating engraving tool didn't help. I pulled the rear wheel off and broke the bead on one side. Then used the plastic bottle and hose supplied with the motorcycle kit to squirt the beads in at the top while squeezing the tire bead away from the wheel. Worked great and didn't have to lever the tire off the wheel. The ride is noticable smoother - I'm sold on this method of balaning tires.
Cheers, 8)
As a gearhead, and an engineer, they work.
I have one wheel on the front of my Porsche that is slightly out of round from a pothole incident. It vibrates pretty bad at anything above 60mph. No amount of balancing has ever corrected it. For giggles, I dumped in some of the beads.
Vibration dropped by a good 70%. It was such a dramatic change I became a believer. I never noticed it much in my motorcycle tires because I am so anal about getting my balance perfect, but in the cars, wow, big difference.
Stolen from a similar thread on ADVrider...
Here's how they work:
http://www.youtube.com/watch?v=y-XHfrIGvoI
Those who are still not convinced should also watch this one...
http://www.youtube.com/watch?v=bBRkep8hVzc
Quote from: "Stretch"Stolen from a similar thread on ADVrider...
All of that looks promising, but........
In the test the wheel doesn't experience bad roads. The constant bouncing due to the road surface will dislocate the beads and cancel out the balancing effect IMHO...
On a side note: since these ceramic beads are not available from that supplier in Germany I would consider metal ball bearing beads to try out this thing. But since my spoked wheels have to have tubes here (official regs - crap!!) how would those beads affect the tube itself? Note: the tube not the tire... :wink:
Cheers,
HG
Quote from: "Stretch"Those who are still not convinced should also watch this one...
Check... Balls ordered... :lol:
I have those in all my cars but I didn't think they would fit in a tube I guess i'll try it today.
BTW in our subaru they have been installed for about two years I have never rotated tires and there is no unusual wear. they work tire shops don't like um becuase you don't have to go in for thier "free" tire rotation and then stick it to you on shocks, alignment, ect. ect.
thanks for waking me up Stretch!
Quote from: "DirtBiker"thanks for waking me up Stretch!
Just a little practical joke among friends. :mrgreen:
Dynabeads will fit in an innertube with straight valve stems. Just remove the valve core and pour in the beads. The applicator available from Dynabeads is a small squeeze bottle with a short length of clear vinyl tubing... just screw the tubing onto the valve stem and pour the beads from the squeeze bottle.
As far as bad roads dislocating the beads... perhaps so, but that would be only a temporary anomaly, yes? In a split-second, the centrifugal force of the spinning wheel would redistribute the beads to their rightful place?
This is theory and conjecture on my part. I do ride on washboarded gravel roads and worse, but if the wheels are unbalanced due to the rough road, I certainly can't feel it over all the rest of the roughness.
Yes, I put them in my DR650 tubed tires. No problem. I'm thinking of putting them in my pop up camper. It's not totally necessary to balance trailer tires but it does keep things from vibrating to pieces inside the trailer.