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 Post subject: Rear mech
PostPosted: Sat Mar 24, 2012 3:44 pm 
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Joined: Wed Dec 29, 2010 10:22 pm
Posts: 445
Location: Bristol uk
Hi guys,
When riding up a hill and in the 25 sprocket the rear mech is just
pinging against the spokes.
I have to ride in the 23,i have mavic cosmic carbone campag hub 11 speed,
do i need a larger spacer or is it adjustment?
:beerchug:

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COLNAGO C60
BMC RACEMACHINE
VOLVO FH 12 480 BHP


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 Post subject: Re: Rear mech
PostPosted: Sat Mar 24, 2012 3:54 pm 
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Joined: Sat Apr 26, 2008 10:44 pm
Posts: 143
Location: Holland/Belgium
My bet is adjustment only. Check your limit screws and you'll probably be fine.


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 Post subject: Re: Rear mech
Posted: Sat Mar 24, 2012 3:54 pm 


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 Post subject: Re: Rear mech
PostPosted: Sat Mar 24, 2012 3:59 pm 
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Joined: Wed Dec 29, 2010 10:22 pm
Posts: 445
Location: Bristol uk
Tom-s wrote:
My bet is adjustment only. Check your limit screws and you'll probably be fine.

Yes i was thinking that, but if i bring it back a little,just wondering
if it will change up to the 25.

I will try and see what happens.

Thanks

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COLNAGO C60
BMC RACEMACHINE
VOLVO FH 12 480 BHP


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 Post subject: Re: Rear mech
PostPosted: Sat Mar 24, 2012 4:47 pm 
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Joined: Wed Oct 26, 2011 8:45 pm
Posts: 37
Or your derailleur hanger could be bent which would also make your derailleur hit the spokes.


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 Post subject: Re: Rear mech
PostPosted: Sat Mar 24, 2012 5:45 pm 
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Joined: Mon Aug 08, 2011 5:46 pm
Posts: 59
I relaced my rear wheel recently running heads in on the DS and as a result had the same issue with spoke contact. Adjusted the derailleur limit to where it would still shift up to the large cog but just barely, and still had rubbing. Ground/filed down the derailleur cage where it was rubbing so it would clear the spokes, but then when I shifted to the large chainring it would rub the spokes again when in the largest cog, not when in the small chainring to large cog combo though. Finally I just ran a larger spacer between the cassette and hub, perfection. I ran an aftermarket lockring I had lying around that had more threads to catch since the cassette was sitting farther out, was likely unnecessary though.

Regardless, lots of little solutions. One or a combination of many may be necessary.


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 Post subject: Re: Rear mech
Posted: Sat Mar 24, 2012 5:45 pm 


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 Post subject: Re: Rear mech
PostPosted: Mon May 07, 2012 10:38 am 
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Joined: Fri Mar 23, 2012 8:56 am
Posts: 26
Location: lancashire UK
I believe there is a very thin shim available that fits on the splines before the cassette to give you just that extra bit of clearance,
but I cant remember who make it.

Barrie


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