Rear Derailleurs (Again)

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The Fuggler
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Joined: Fri Aug 22, 2008 13:52 pm

Rear Derailleurs (Again)

Postby The Fuggler » Thu Jan 09, 2014 10:54 am

I've been having some issues with my rear derailleur. I've followed some of the previous advice on here and used the Park Tools videos, but I'm still no closer to resolving the issue. I can either get the shifting up or down the cogs to be smooth but not both. Checked for a bent derailluer but it seems fine (it's practically brand new). Chain is reasonably new and there doesn't appear to be an issue around the limit of movement, so I'm down to a short list of cable and cassette. Any thoughts or advice?

One other thought - the previous rear mech failed fairly spectacularly (snapped). I wonder if that might have affected the cables in any way?
FCN 3 / 4

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The Fuggler
Posts: 1211
Joined: Fri Aug 22, 2008 13:52 pm

Re: Rear Derailleurs (Again)

Postby The Fuggler » Thu Jan 09, 2014 14:06 pm

Bah - looks like multiple issues. Wheel bearings and cassette potentially need an overhaul.
FCN 3 / 4

maringirl
Posts: 193
Joined: Thu Oct 11, 2012 13:46 pm

Re: Rear Derailleurs (Again)

Postby maringirl » Thu Jan 09, 2014 19:39 pm

Check that the hanger that the RD sits on it straight. Otherwisie I'd suspect cable.

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The Fuggler
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Re: Rear Derailleurs (Again)

Postby The Fuggler » Fri Jan 10, 2014 14:15 pm

Turned out it was mostly wheel bearings causing play in the cassette (and tired chain plus tired cassette).
FCN 3 / 4

n4th4n007
Posts: 292
Joined: Fri Jun 08, 2012 20:23 pm

Re: Rear Derailleurs (Again)

Postby n4th4n007 » Wed Jan 29, 2014 20:53 pm

I had a similar issue a few weeks ago, turns out I had my 10 speed chain on round the wrong way!? Whooda thought.

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icon cycles
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Joined: Tue Mar 11, 2014 22:10 pm

Re: Rear Derailleurs (Again)

Postby icon cycles » Tue Mar 11, 2014 22:24 pm

If you can only get it to go either up or down smooth it could be a number of things but here are the common reasons
Chain is to short
Shifter and derailleur are not compatible (this happens with some Sram and Shimano combinations as the are different activation ratios.
If this bike is a Carerra Kracken they had a problem with there derailleurs if you like you can send a picture of the parts see if I can see anything.


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