Rear mech

Discuss light weight issues concerning road bikes & parts.
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markyboy
Posts: 640
Joined: Wed Dec 29, 2010 10:22 pm
Location: Bristol uk

by markyboy

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:
COLNAGO C60 SUPER RECORD EPS
Pinarello f8 sram etap
Eddy merckx 69 ultegra disc winter bike

Tom-s
Posts: 144
Joined: Sat Apr 26, 2008 10:44 pm
Location: Holland/Belgium

by Tom-s

My bet is adjustment only. Check your limit screws and you'll probably be fine.

by Weenie


markyboy
Posts: 640
Joined: Wed Dec 29, 2010 10:22 pm
Location: Bristol uk

by markyboy

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
COLNAGO C60 SUPER RECORD EPS
Pinarello f8 sram etap
Eddy merckx 69 ultegra disc winter bike

crosschained
Posts: 37
Joined: Wed Oct 26, 2011 8:45 pm

by crosschained

Or your derailleur hanger could be bent which would also make your derailleur hit the spokes.

weaverdcivw
Posts: 59
Joined: Mon Aug 08, 2011 5:46 pm

by weaverdcivw

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.

by Weenie


Barrie
Posts: 26
Joined: Fri Mar 23, 2012 8:56 am
Location: lancashire UK

by Barrie

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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