Dynabeads, can ya get them here?

**nzspokes** · 15th June 2014, 19:13

What makes these beads different to say ball bearings?

Ive never seen them so was wondering?

**caspernz** · 15th June 2014, 21:06

Originally Posted by nzspokes

What makes these beads different to say ball bearings?

Ive never seen them so was wondering?

In size they're no bigger than the ball at the end of a fine tip ballpoint. And any colour you like, as long as you like black

**R650R** · 15th June 2014, 21:39

Originally Posted by caspernz

Ok, let me add another 5 cents then. We run the dynabeads or whatever equivalent the tyre guy uses, in the steer tyres on Scania trucks. The reason for this is supremely simple, the clearance between rim and brake calipers is so slim that weights stuck to the inside of the rims would get mushed or torn off. Now a new set of steer tyres is ok until they're about half worn or so, then they used to start to shake and vibrate a little due to slightly uneven wear, the joys of high power and heavy loads. Add beads and this problem stays away. So do the beads work? In my personal experience, hell yes!

The only variable would be knowing how much to add to a bike tyre in terms of weight of beads. The problem described by OP of high wear rates on a big heavy bike ridden hard has similarities to the truck tyres we used to have....and yes beads do work in terms of keeping a tyre balanced as it wears, at least in my personal experience.

Truck steer tyres can be fickle things, sounds like its worked for you. On a side note the last CVIU that pulled me said any sign of uneven wear or scalloping (seems to happen lot on Scanias) was an instant rectify notice. The only balance issue I experiences with worn steers is when tight arse employer flips them on rim to even wear, that always creates a vibration problem

**nzspokes** · 15th June 2014, 21:49

Originally Posted by caspernz

In size they're no bigger than the ball at the end of a fine tip ballpoint. And any colour you like, as long as you like black

Oh really? So you can stuff them down the valve hole after the tyre is fitted. Thats kinda cool.

I was going to paint my rims and didnt want weights on them. may well look at this.

**Kickaha** · 15th June 2014, 21:53

Originally Posted by R650R

The only balance issue I experiences with worn steers is when tight arse employer flips them on rim to even wear, that always creates a vibration problem

If it is done on a regular basis it shouldn't, most people leave it too long

**jellywrestler** · 15th June 2014, 22:39

Originally Posted by HenryDorsetCase

I've got some anal beads I would sell. Only slightly used.

Does Drew know you're selling the gift he gave ya?

**caspernz** · 16th June 2014, 08:02

Originally Posted by nzspokes

Oh really? So you can stuff them down the valve hole after the tyre is fitted. Thats kinda cool.

I was going to paint my rims and didnt want weights on them. may well look at this.

Mmmm, dunno about the stuffing them down the valve hole idea. Our tyre guys have small plastic bags of beads, matched for rim diameter if I recall correctly, and the whole bag gets inserted when the new tyre goes on. Bag bursts when tyre rotates and beads do their thing...apparently.
When you see the beads scatter when the tyre is demounted at end of life...the idea of putting them thru the valve hole at the start will lose appeal...