Hub adjustment

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Stephenjames
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Hub adjustment

Postby Stephenjames » Thu Nov 22, 2012 08:39 am

Hi, can anyone help me? I have a shimano rear hub on a Specialized Stumpjumper that either over-tightens itself or loosens completely. I have tried adjusting it with cone spanners to try and get the balance right with the quick release. I have read the write-up at Park tools to try and fathom the 'nack' of how to keep the pressure of the cups on the bearings. Can anyone please explain how to keep the wheel nuts from loosening?

Thnaks

Chunkers1980
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Re: Hub adjustment

Postby Chunkers1980 » Thu Nov 22, 2012 08:43 am

Do the lock nuts up very tightly, both of them.

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cooldad
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Re: Hub adjustment

Postby cooldad » Thu Nov 22, 2012 09:12 am

What he says, and if you are using the QR for any sort of adjustment you're doing it wrong.
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benpinnick
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Re: Hub adjustment

Postby benpinnick » Thu Nov 22, 2012 10:08 am

The best way (IMHO) is to over tighten the cones and the lcknuts slightly, so that the hub is running a bit rough, then, holding the locknut tight (a vice is good for this) back the cone off again to it bites tight onto the locknut. You might need two or three goes to get it right, but this should give you a solid bind between cone and locknut.
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cooldad
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Re: Hub adjustment

Postby cooldad » Thu Nov 22, 2012 11:00 am

I tend to do it the opposite way, the cone fractionally loose, then tighten up the locknut, but it's really just getting it right, which just means a bit of fiddling - main thing is to get the locknut tight.
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zx6man
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Re: Hub adjustment

Postby zx6man » Thu Nov 22, 2012 11:05 am

QR 's have hollow axles so can flex a bit, which is why its the norm to set them on the slighlty loose side. Works for me

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supersonic
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Re: Hub adjustment

Postby supersonic » Thu Nov 22, 2012 12:34 pm

cooldad wrote:What he says, and if you are using the QR for any sort of adjustment you're doing it wrong.


You are supposed to do the adjustment with a slight bit of play, as the QR tension actually adds pressure.

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cooldad
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Re: Hub adjustment

Postby cooldad » Thu Nov 22, 2012 13:49 pm

Maybe it just gets easier with practice. When I was a lad there was nothing else so must have done a million or two, as I'm very old. But once the locknut is really tight I can't see them moving by more than a billimetre when you do the QR/nuts up.
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supersonic
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Re: Hub adjustment

Postby supersonic » Thu Nov 22, 2012 14:06 pm

it compresses the axle. And it makes a difference.

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cooldad
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Re: Hub adjustment

Postby cooldad » Thu Nov 22, 2012 14:12 pm

Fair enough, I bow to your professional blue blobbiness.
Guess it's just something you just do after a while, don't really think about.
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The Rookie
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Re: Hub adjustment

Postby The Rookie » Thu Nov 22, 2012 17:50 pm

I locktight a locknut and cone on one side adjust the cone properly (just on the edge of loose) then using 2 people hold locktited locknut and adjusted cone while doing up the locknut.

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cooldad
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Re: Hub adjustment

Postby cooldad » Thu Nov 22, 2012 18:08 pm

Pussy. I just use my personal awesome strength.
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Stephenjames
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Re: Hub adjustment

Postby Stephenjames » Fri Nov 23, 2012 17:59 pm

Thnx for all the help and advice, very useful. I think I have the basic idea now, just something that comes with exprience.


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