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#541431 - 05/05/14 3:52 pm How much runout on spoked wheels?  
Joined: Apr 2014
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stoinkythepig Offline
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stoinkythepig  Offline
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Raymond, NH, USA
I am working on cleaning up my BSA 441 Shooting Star and noticed that many rear wheel spokes were loose. I set up dial indicator and found that the wheel was not very true. I got it to within .020" in radius and .025" side to side. I can't get much better than that because the rim itself is not uniform. The spokes are all tight now and the wheel certainly passes the eyeball test.

What's considered normal runout tolerance on a spoked motorcycle wheel?

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#541458 - 05/05/14 8:00 pm Re: How much runout on spoked wheels? [Re: stoinkythepig]  
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downhere Offline
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downhere  Offline
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Australia
20 thou is a bees dick. Good to go!

#541460 - 05/05/14 8:17 pm Re: How much runout on spoked wheels? [Re: stoinkythepig]  
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Mr Mike Offline
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Probably better than a new wheel...go for it.

Mr Mike

#541462 - 05/05/14 8:32 pm Re: How much runout on spoked wheels? [Re: stoinkythepig]  
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Tridentman Online content
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New Jersey USA
The figures I have seen quoted are:
Triumph: 1/16" (62.5 thou) presumably both for radial and lateral run out.
Harley: up to 1/8"--again presumably for both--although this seems enormous to me--maybe where the tractor name came from!
For myself I reckon to get a maximum of 20 thou on both IF working with a good rim--such as Devons.
If you have a rim with a kick where it is welded then you can get a short kick above those figures.
With a good rim I can sometimes get a max of 10 thou but 20 is I think a better more repeatable target to aim for.
If you have got 20 and 25 thou then as Mike says--it is probably better than when it left the factory.
I would have no hesitation in using it as it is.
HTH

#541466 - 05/05/14 9:09 pm Re: How much runout on spoked wheels? [Re: stoinkythepig]  
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stoinkythepig Offline
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stoinkythepig  Offline
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Raymond, NH, USA
Thanks for the replies, I figured it was good to go, but really glad to hear it's better than typical.

#541499 - 05/06/14 2:16 am Re: How much runout on spoked wheels? [Re: Tridentman]  
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TR6Ray Online content
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TR6Ray  Online Content

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Illinois, USA
Originally Posted By: Tridentman
The figures I have seen quoted are:
Triumph: 1/16" (62.5 thou) presumably both for radial and lateral run out.
Harley: up to 1/8"--again presumably for both--although this seems enormous to me--maybe where the tractor name came from!
For myself I reckon to get a maximum of 20 thou on both IF working with a good rim--such as Devons.
If you have a rim with a kick where it is welded then you can get a short kick above those figures.
With a good rim I can sometimes get a max of 10 thou but 20 is I think a better more repeatable target to aim for.
If you have got 20 and 25 thou then as Mike says--it is probably better than when it left the factory.
I would have no hesitation in using it as it is.
HTH

T-Man,

I mostly agree with what you said, except that what you have seen quoted is different than the Harley Davidson FSM which says 1/32" max. (.031") for both lateral and radial runout. So maybe the "tractor" name came from the same folks who came up with the other derogatory names like "Hardly Ableson", "Hardly Ferguson", "Hardly Drivable", etc., etc.

The only Triumph wheels with which I have any experience are on my TR6. There is indeed a "kick" at the weld, but ignoring that they are under .015"

My little cheapo Honda CL350 wheels trued within less than .002" (their FSM says the standard value is .5mm or .020" either radially and vertically.)

In most cases, I'd bet that the tire will have more runout than these figures, but if the wheel is wrong to begin with, the tire runout will obviously be that much worse.

Ray


'64 TR6R Plus some Twins from other countries (U.S., Germany, Japan)
#541507 - 05/06/14 3:35 am Re: How much runout on spoked wheels? [Re: stoinkythepig]  
Joined: Dec 2003
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Per B Offline
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Per B  Offline
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Oslo Norway
I have a Yamaha TZ250/350 service manual on my shelf and they give a runaout of 1,5 -2,0mm in both directions on a road racer. Your ,020" is about 0,5 mm meaning you are ready to go...When building my own wheels i try to get better than 0,5 mm but some wheels are just imposible to get better than 1,00 and there is no way you can feel the difference.


best regards

Per
Goldi Clubmans
Goldi Scrambler
Rob North R3
OIF A65
#541529 - 05/06/14 9:16 am Re: How much runout on spoked wheels? [Re: stoinkythepig]  
Joined: Feb 2008
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Tridentman Online content
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Tridentman  Online Content

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Posts: 4,048
New Jersey USA
Hi Ray--I bow to your info on the HD figures--I can't remember now where I saw the 1/8" figure but do remember it as I thought--Jeez!--that is a lot.
Looks as if 20/25 thou for both radial and lateral run out is a good target figure plus a bit more for any rim kick there may be.

#541577 - 05/06/14 3:14 pm Re: How much runout on spoked wheels? [Re: stoinkythepig]  
Joined: Jul 2009
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Pete R - R.I.P. Offline
In Remembrance
Pete R - R.I.P.  Offline
In Remembrance

Joined: Jul 2009
Posts: 3,549
Vic. Australia
You can have a perfect rim and fit a new tyre to it,and the new tyre will sometimes have 0.030" radial runout.
0.020" radial runout is nothing to worry about.It could even be an advantage if you put the tyre in the right place to minimise runout.


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