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Random13
Scooby Slapper



Joined: 12 May 2013
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PostPosted: 17:15 - 31 Oct 2013    Post subject: wheel balance Reply with quote

Hi guys,
As bike owners, how often should I do wheel balance and what are the signs which shows an unbalanced wheel ?

I normally take it for a wheel balance if it is vibrating around 40-50 miles as with cars which has never happened to my bike. is that the right approach ?

Would you simply take the tyre to a dealer ( bike) to balance it ?

Thanks
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Howling TerrorOutOfOffice
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Joined: 05 Dec 2008
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PostPosted: 17:53 - 31 Oct 2013    Post subject: Reply with quote

Unbalanced wheel will vibrate at particular speeds.
The wheel on my 250 is slightly out of balance but only starts vibrating about 80mph.

You can balance them yourself but it won't be as accurate compared to the machines the tyre fitters use. Whip the wheels off to save yourself some money.
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pdg
World Chat Champion



Joined: 15 Sep 2012
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PostPosted: 19:16 - 31 Oct 2013    Post subject: Reply with quote

If you ever have the opportunity try this...

Put wheel on balancing machine, fit weights where it tells you to = wheel balanced. Take the wheel off the machine. Now, put the wheel back on the same machine and press the button - if it still says the wheel is balanced I'll post you 2 new English pence. (I demonstrated this a few times when I used to fit tyres for a living...)





I don't bother balancing wheels/tyres any more.
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Nobby the Bastard
Harley Gaydar



Joined: 16 Aug 2013
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PostPosted: 19:25 - 31 Oct 2013    Post subject: Reply with quote

....whereas I've seen a wheel balanced according to the machine and them hve the machine to say it's balanced (down to the tolerance of the available weights) afterwards several times.

Maybe the balancing machine needed 'balancing'...
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pdg
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Joined: 15 Sep 2012
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PostPosted: 20:15 - 31 Oct 2013    Post subject: Reply with quote

If you balance the wheel, then get the machine to spin it again without removing it then it'll carry on saying it's balanced.

If you're really that bothered about keeping your wheels balanced, you really should get them done at least every 0.1mm of tread wear. After losing that much rubber it's going to be 'out' again.
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Nobby the Bastard
Harley Gaydar



Joined: 16 Aug 2013
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PostPosted: 20:22 - 31 Oct 2013    Post subject: Reply with quote

pdg wrote:

If you're really that bothered about keeping your wheels balanced, you really should get them done at least every 0.1mm of tread wear. After losing that much rubber it's going to be 'out' again.


I wouldn't go as far as every .1 of a mil but a warped front disk was enough to cause enough uneven wear on my front tyre to make the vibration awful above 85 mph.
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pdg
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PostPosted: 20:29 - 31 Oct 2013    Post subject: Reply with quote

Nobby the chihuahua wrote:
pdg wrote:

If you're really that bothered about keeping your wheels balanced, you really should get them done at least every 0.1mm of tread wear. After losing that much rubber it's going to be 'out' again.


I wouldn't go as far as every .1 of a mil but a warped front disk was enough to cause enough uneven wear on my front tyre to make the vibration awful above 85 mph.


In that particular case, the vibration would have been caused by the tyre being not round any more.

Balancing that would've done the sum total of fuck all (mechanically speaking).
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Nobby the Bastard
Harley Gaydar



Joined: 16 Aug 2013
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PostPosted: 21:23 - 31 Oct 2013    Post subject: Reply with quote

I don't see your argument about .1 mil in that case.

You (correctly) say that un-even wear can't be corrected by balancing due to the wheel no longer round

The smallest balancing weight is 5g.

How much does, for example, 0.1m worn off the circumference of a 3-4 inch strip of a tyre weight?

How much does a tyre valve weigh?

What is the variation in weight of tyre valves?

How perfect is the metal of the wheels created (either cast or spoke/rim). I have cast wheels and any imperfection in their casting, especially near the rim, will unbalance the wheel)
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moonzoomer
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PostPosted: 21:37 - 31 Oct 2013    Post subject: Reply with quote

wheels rarely go out of balance unless damaged, it is the tyre that needs balancing.
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G
The Voice of Reason



Joined: 02 Feb 2002
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PostPosted: 21:40 - 31 Oct 2013    Post subject: Reply with quote

Only time I've had a proper issue with it was when I fitted a tubeless system to my KTM.
Put the balance out by about 100g.
It was fine for off road or slower stuff, but above about 55 started to be a bit noticeable.
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Nobby the Bastard
Harley Gaydar



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PostPosted: 21:45 - 31 Oct 2013    Post subject: Reply with quote

moonzoomer wrote:
wheels rarely go out of balance unless damaged, it is the tyre that needs balancing.


Wheels don't ALTER their balance. Tyres are heavy but are largely equal over their circunference but still need balancing for, as do valves.

If you want to know whether balancing makes a diferrence, take of the tyre and the valve. Stick the wheel on to the spindle and hold it vertically and let it spin freely. I bet it eventually ends up with the valve hole near the top
.
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pdg
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PostPosted: 22:33 - 31 Oct 2013    Post subject: Reply with quote

My point about rebalancing every 0.1mm of tread wear was mildly veiled sarcasm, but I don't know which smiley to use for that.

The smallest balance weight may well be 5g, but you can cut them y'know.

Whenever I have mentioned 'wheel' in reference to balancing, I was of course using that word as shorthand for 'wheel, tyre and valve/tube assembly'

I know exactly what difference balancing can make thanks, I don't need to fanny about spinning a bare wheel. I also know exactly what effect an imbalance can make to a spinning assembly.

Usually, fitting a tyre with the coloured blob next to the valve will give you a sufficiently well balanced assembly to need no further intervention.


Hence the sarcasm bit - if your paranoia about balancing extends to getting it reassessed during the life of the tyre, then you might just as well get it done every time you go out.
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misscrabstick
Crazy Courier



Joined: 05 Jul 2013
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PostPosted: 22:41 - 31 Oct 2013    Post subject: Reply with quote

I recently had 3 tyres fitted to various loose wheels by my local bike shop, he has been in business for 40 years and we discussed balancing, he was of the opinion that providing the wheel has no lumps out of it and the tyre is fitted with the dot by the valve then no further balancing is generally required, having ridden both my bikes with the new tyres fitted at some high speeds, I can't detect any issues.
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