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donmacn

Member Since: 06 Nov 2017
Location: Nth Scotland
Posts: 1841

^^^ Ha ha!

Maybe for all you modern soundproofed guys with Pumas and later....

I had them in the fronts on my 300tdi for a while, and will likely give them another go, but there was no chance of my hearing them....

I wonder if they might be audible and low speeds off road?? But I'd imagine not. Lookign forward to other replies. Donald

1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong
(The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html )
2000 Range Rover P38 4.0L V8

in the past..
RR classic - fitted with 200Tdi
1984 RR classic - V8 with ZF auto box
1993 Discovery 300Tdi

not to mention the minis and the Type 2 VW camper...

11th Oct 2019 7:35am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17382

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

^^ You can hear them if you jack the wheel up and rotate it slowly by hand, but when you're driving the beads aren't moving so you don't hear them.

Co1 wrote:
Well, I put 6oz in each and can’t really tell the difference. I still get a wobble at 55-60. Just passed MOT a few weeks ago so I’m pretty confident and all the steering and bearings are ok. I’m on Goodyear MTRs, is it worth sticking a few more oz in each?

Is it a persistent wobble? Remember with the beads that if you stop, they'll all fall to the bottom of the tyre so there is likely to be a bit of a shimmy as you start up, until the beads settle into a balanced state and it calms down. As a result, there will be some wobble now and again, but generally it will sort itself out.

As my KM2s are approaching half worn, I am starting to get a wobble now and again from the front at specific speeds, which I suspect is symptomatic of needing more beads. If you look at a part worn MT correctly rebalanced with lead weights, you would probably expect to see far more than 6-8oz of lead, so perhaps it is not surprising.

I don't think that sticking beads in means that you never again have the slightest hint of a wobble, for that you need a miracle rather than beads! Certainly though my experiences with them have made me feel that they are generally more satisfactory that fixed weights in most respects, I particularly like the way that they self adjust to rebalance as the tyre wears, which fixed weights cannot.

Don't forger also that if you still have a vibration it may not be the wheels and tyres, a failing rear propshaft can, for example, feel just like out-of-balance rear wheels.

11th Oct 2019 7:39am

geobloke

Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4410

Re: Dynabeads in rear tyres?

geobloke wrote:
Co1 wrote:
Is this a stupid question? Does anyone bother with the rears??

Even more stupid question for those with these fitted. Do you hear the beads at all?

I just have this mental image of the sound dried chickpeas would make in an inflated balloon... Boing boing shhhhhh clatter... .

At every traffic light and junction...

11th Oct 2019 7:42am

deaallen

Member Since: 15 Feb 2016
Location: Basingstoke
Posts: 264

2012 Defender 90 Puma 2.2 SW Santorini Black

Are there any fitting centres for these in UK or is it a job for the driveway?

11th Oct 2019 8:12am

geobloke

Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4410

Looks as if you can do it on your driveway, but yo'll need a valve removal tool and an air pump.

Seriously tempted to go for these...

11th Oct 2019 10:54am

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20367

Yes, you can do it at home. You’ll need a decent compressor or at least plenty of time if a cheap one.
There isn’t any noise whilst in use.

I would check prop shaft UJ’s too, they are prone to causing issues at certain speeds.
In fact it was this that caused me to fit the Dynabeads in the first place which didn’t solve sole the issue.
The Dynabeads are great but if you have a failed UJ cup with dead bearings that will send and unbalance right back and will make you feel like there is a wheel problem.

Worse than that, on mine you couldn’t tell the UJ was screwed without the prop off however hard I tried and various places never noticed either.

Typically it’s the rear most UJ that’s the culprit, mainly due to angle as BW has suggested many time it’s a Puma thing due to the more extreme angle of prop rotation on the rear in relation to the T Box. $W33T $0U7H3RN $UG4R
🇬🇧🏴󠁧󠁢󠁥󠁮󠁧󠁿🏴󠁧󠁢󠁷󠁬󠁳󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿🇮🇪🇺🇸⛽️🛢️⚙️🧰💪

11th Oct 2019 11:31am

Co1

Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3675

Interesting. My commute is about half an hour at 55mph. First 10 minutes were terrible, but then smooth as you like after that. Any thoughts?

11th Oct 2019 12:44pm

rallysteve

Member Since: 10 Feb 2014
Location: Cumbria
Posts: 2227

2002 Defender 110 Td5 DCPU Keswick Green

Do you have wheel spacers fitted? I assume you have alloy wheels in any case?

If so it would be worth taking them off and making sure the hub mating faces are spotless. The smallest bit of debris can cause a mild wheel wobble at the speeds you describe.

I have dynabeads in my 255/85 BFG MTs with no other balancing and there is no wobble at all. You cant hear the beads at all in service. By nature they are only free to roll around in the tyre at very very low speed.

Steve 02' 110 TD5 Double Cab Rebuild Thread

11th Oct 2019 1:09pm

Co1

Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3675

Got wheel spacers fitted, will double check The faces This weekend, but it was fine before the beads we’re installed. Tonight it was terrible for a couple of minutes, smooth for 5, terrible again all the way home. I’ll call dyna bead on Monday, but I also have a suspicion there could have been water in the airline I used 🤦‍♂️. Anyone experienced this?

11th Oct 2019 5:21pm

mick

Member Since: 08 Feb 2010
Location: Yorkshire
Posts: 2109

2010 Defender 130 Puma 2.4 HCPU Rimini Red

Going to give these a go in mine and on the RIB trailer

11th Oct 2019 6:30pm

Co1

Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3675

Just spoke to the guys at dyna bead; super helpful. Thought is that I actually have too much weight on there. I’ve got 125g weights on the rims and 6oz of beads. They would recommend 6oz of beads and no weights, so I’ll mark them up, take them off and see how it is. Watch this space.

11th Oct 2019 6:40pm

mick

Member Since: 08 Feb 2010
Location: Yorkshire
Posts: 2109

Good advice I guess

11th Oct 2019 6:43pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20367

I've not had any problems with mine with both but could be variable. $W33T $0U7H3RN $UG4R
🇬🇧🏴󠁧󠁢󠁥󠁮󠁧󠁿🏴󠁧󠁢󠁷󠁬󠁳󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿🇮🇪🇺🇸⛽️🛢️⚙️🧰💪

11th Oct 2019 7:01pm

Co1

Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3675

What tyres are you using Steve?

12th Oct 2019 6:36am

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20367

255/85/R16 KM2’s on Boosts with standard spec weight Dynabeads and balancing weights on the inside of the rim that was fitted before the Dynabeads.

Are you sure they were balanced correctly in the beginning or have you lost one? $W33T $0U7H3RN $UG4R
🇬🇧🏴󠁧󠁢󠁥󠁮󠁧󠁿🏴󠁧󠁢󠁷󠁬󠁳󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿🇮🇪🇺🇸⛽️🛢️⚙️🧰💪

12th Oct 2019 10:07am

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