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Gilloverland



Member Since: 12 Nov 2017
Location: Yorkshire
Posts: 61

United Kingdom 
Another positive for dynabeads, got them from Extreme 4x4 years ago (in fact they may still have been scorpion at the time). Anyway, final fitted them a couple of months ago to BFG KM2s in 255/85r16 on wolf rims - spot on, some times, as has been said, they take a while to settle at a given speed but id say 95% of the time they work spot on. They also adjust for knocks to the tyre / mud etc.

This is about the best video, showing then work:
Post #766354 1st Apr 2019 9:18am
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Supacat



Member Since: 16 Oct 2012
Location: West Yorkshire
Posts: 11018

United Kingdom 2013 Defender 110 Puma 2.2 XS DCPU Keswick Green
Do they have a finite life?
Post #766518 2nd Apr 2019 12:27pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19454

United Kingdom 
I’d imagine the tyre lifetime. Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #766575 2nd Apr 2019 5:46pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16812

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
They should last much longer than the tyres, provided that they can be recovered from the tyres when the latter are replaced.
Post #766602 3rd Apr 2019 12:06am
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19454

United Kingdom 
I can’t imagine many doing that though or accuracy being maintained with losses of beads in weight.
I had some complaining once at a tyre fitter “You don’t have any of those dusty tyre beads in there or anything do you?”.

By the time you go though that they'd want to charge you too probably suggesting it’s a unique job.
Pretty much by that stage I’d have thought it practically pays to replace.
That could be an opportunity to fit the larger standard beads in as well.

But of course if anyone does their tyre change themselves if they are capable or would prefer to re-use then everyone has their own view and option to do so.

I would have thought there would be contaminants in there and possibly dust too by that stage but I’m no expert. Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #766678 3rd Apr 2019 3:56pm
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CDN38



Member Since: 14 Nov 2014
Location: Courtenay, BC
Posts: 729

Canada 2000 Defender 110 Td5 SW Bonatti Grey
I have been running balancing beads in my 285/75/16's for 3 years now. I'm very pleased with the result.

I am running Matt Lee's with the rolled edge, so the it's pretty much the only option other than the stick on weights which would only give a static balance. I think the beads are more equal to a dynamic balance. it's a Landrover thing...

my renovation thread:
http://www.defender2.net/forum/topic40792.html
Post #766679 3rd Apr 2019 4:05pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19454

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They are great, and yes as you mention dynamically balance instead of static which is good.
Stones in threads also throw balance off with static weights, usually until they are thrown off at great speed. Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #766683 3rd Apr 2019 4:58pm
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Supacat



Member Since: 16 Oct 2012
Location: West Yorkshire
Posts: 11018

United Kingdom 2013 Defender 110 Puma 2.2 XS DCPU Keswick Green
CDN38 wrote:
other than the stick on weights which would only give a static balance.


Why do you say stick on weights only give a static balance?
Post #766773 4th Apr 2019 7:00am
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ken



Member Since: 18 Aug 2009
Location: Banging Birds with my bitches !!
Posts: 4328

United Kingdom 
Personally I only use proper weights I spend the right time and methods to get the right result if its good enough for F1 then its good enough for me Thumbs Up
Post #766792 4th Apr 2019 9:37am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16812

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
One very positive advantage of beads over weights is the fact that they are dynamic, so they readjust to the changing weight of the tyre as the tyre wears. With a road-biased tyre this probably isn't a significant factor since the wear will generally be even, but if, like me, you run mud tyres is is a huge advantage since it is very rare that MTs wear evenly.

In the days when I used fixed balance weights I would find that after 30k to 50k miles they would become almost completely ineffective due to tyre wear. Since changing the to beads, this doesn't happen (the only thing I have found was that I had to dump a load more beads into the tyres - I now have 500g in each 255/85 x 16 KM2, which is somewhat more than the bead manufacturer thought necessary).
Post #766806 4th Apr 2019 10:10am
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Supacat



Member Since: 16 Oct 2012
Location: West Yorkshire
Posts: 11018

United Kingdom 2013 Defender 110 Puma 2.2 XS DCPU Keswick Green
ken wrote:
Personally I only use proper weights I spend the right time and methods to get the right result if its good enough for F1 then its good enough for me Thumbs Up


Interesting to read that many racing teams do not dynamically balance their tyres though?

I found this an interesting read, especially regarding what dynamic balancing actually is ~ not just spinning tyre on a machine.

http://rtstools.com/how-to-balance-your-ow...balancing/

I'm also wondering if beads can actually undertake dynamic balancing or are just very good at the static element, especially with a 4x4 tyre that can wear significantly on the outer tread.
Post #766814 4th Apr 2019 10:44am
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jonny



Member Since: 10 Mar 2013
Location: North Wilts
Posts: 143

I've got one of those bubble balancing setups - I've only used it a couple of times (not on Landy sized wheels) but it definitely works. It's a bit fiddly and takes a while but probably if I used it a few more times I'd be able to get quicker at using it Smile

I think with a lot of kit garages have, a spinny balance machine is quick, fairly foolproof and looks impressive to customers. Likewise with wheel alignment rigs - a lot of race teams still use string and maths!!
Post #766816 4th Apr 2019 11:05am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16812

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Supacat wrote:
....

I'm also wondering if beads can actually undertake dynamic balancing or are just very good at the static element, especially with a 4x4 tyre that can wear significantly on the outer tread.


Did you read my post, immediately before yours? Thumbs Up
Post #766832 4th Apr 2019 12:28pm
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Supacat



Member Since: 16 Oct 2012
Location: West Yorkshire
Posts: 11018

United Kingdom 2013 Defender 110 Puma 2.2 XS DCPU Keswick Green
Blackwolf ~ yes I did Thumbs Up

I was trying to comment on the fact that the beads may be dynamic, in the dictionary definition of that word, whilst not addressing the fact that they do not dynamically balance, or rather address the coupling imbalance that contributes to dynamic imbalance; instead beads just address the static imbalance element.

The language of balancing seems a little perverse ~ maybe better to see static balance as the centrifugal balance. I found the pdf attachment to the previously linked Web page quite enlightening.
Post #766856 4th Apr 2019 2:55pm
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CDN38



Member Since: 14 Nov 2014
Location: Courtenay, BC
Posts: 729

Canada 2000 Defender 110 Td5 SW Bonatti Grey
Supacat wrote:
CDN38 wrote:
other than the stick on weights which would only give a static balance.


Why do you say stick on weights only give a static balance?


In the case of Matt Lee rolled edge rims there is no "open lip" on the edge of the rim for clip on style weights, nor is there enough of flat surface for adhesive weights to sit. Therefore the only type of balancing would be to use the adhesive weights in the center of the rim, which is a static balance, or the balance beads.



Click image to enlarge
 it's a Landrover thing...

my renovation thread:
http://www.defender2.net/forum/topic40792.html
Post #766876 4th Apr 2019 3:50pm
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