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Ultegra 6700 10sp Compact Shifting Problems

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Ultegra 6700 10sp Compact Shifting Problems

Old 09-01-14, 08:17 AM
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CoconutJoe
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Ultegra 6700 10sp Compact Shifting Problems

Hi, looking for some advice on the logical next steps to try to fix a problem with my bike. I've had a look around the found a few people with similar issues but no definitive answer.

I recently bought a used 2012 road bike with the following spec:

Ultegra 6700 shifters / rear derailleur / crankset
105 chain / cassette
Jagwire (unknown) cabling

I've had issues with shifting on the RD since I got it. Sometimes skipping gears, not shifting at all, lagging or not shifting into the lowest gear. It doesn't happen all the time but often enough for it to be a major annoyance. I've attempted to fix it myself, following instructions from various sources, sometimes getting it smooth one way but then sticky the other. I've just had a mobile mechanic out to look at it and even he couldn't get it perfected. He serviced the front and rear mechs, cleaned and lubed the chain and cassette. His suggestion is it could possibly be the cabling (which the seller said was changed prior to sale; I've done around 200 miles or so in a couple of weeks) or possibly the RD has taken a knock and maybe been bent.

I've done some looking and I like the sound of the Yokozuna Reaction cables if I were to go ahead and change the cables. I know these would be an improvement regardless but my main concern just now is getting the shifting smooth and crisp. Is there anyway of telling if the RD has actually bent?

Any advice/suggestions will be much appreciated. I can provide pictures if you think it will help; just tell me what you'd like to see.

Thanks.
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Old 09-01-14, 08:51 AM
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So the mobile guy didn't check the cables and housings?
I'd pickup a spare inner cable just in case. Then remove the rear derailleur cable and all of the housings. Pull the end caps off and check each end to ensure that the housing is cut square, round, clean, and the inner lining is not crushed or ragged. Make sure every end has a cap - unless one can't be used.
Make sure each housing run has smooth curves but no excess. Test the cable and make sure it moves freely.
Then re-attach everything and adjust. Double check the B-screw adjustment.
If that doesn't solve the problem then take it to your LBS to have the derailleur hanger checked for alignment.
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Old 09-01-14, 09:03 AM
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Originally Posted by Slash5 View Post
If that doesn't solve the problem then take it to your LBS to have the derailleur hanger checked for alignment.
Only do that FIRST.
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Old 09-01-14, 11:10 AM
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I agree about getting the derailleur square first, but if I were going to remove all of my shift cable housings I would just replace them with new lined housings, properly installed per Slash5's comments.

While I was at it I would likely replace the inners as well, with die-drawn stainless ones, since they are consumable and cables are a common cause of shifting woes when worn.
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Old 09-02-14, 12:58 PM
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Thanks for the replies. Just back from a ride and what a nightmare! Worst than it was before I paid someone to look at it. Taking forever to go into any gear. Lagging for what seems forever so often I was shifting again only for it to jump into the gear I was intending then straight back out again. Anyone experienced anything like this before?

Also, something somewhere is clicking 1 to 2 or even 3 times per pedal revolution.It's driving me nuts. Any suggestions? I'm just about to look around Sheldon Brown's site to look for a diagnosis but thought I'd mention while I'm here.
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Old 09-02-14, 02:30 PM
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Originally Posted by CoconutJoe View Post
Also, something somewhere is clicking 1 to 2 or even 3 times per pedal revolution.It's driving me nuts. Any suggestions? I'm just about to look around Sheldon Brown's site to look for a diagnosis but thought I'd mention while I'm here.
I had a similar experience with the "ticking" noise on pedal revolutions. Turned out to be my pedals, unscrewed them, grease, back in, job done! Phew!
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Old 09-02-14, 02:35 PM
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Originally Posted by SharpLogic View Post
I had a similar experience with the "ticking" noise on pedal revolutions. Turned out to be my pedals, unscrewed them, grease, back in, job done! Phew!
Thanks Sharp. Did a bit of digging and this seems to be a common solution. I'll give it a try.
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Old 09-02-14, 04:51 PM
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Ya, definitely get that thing to a competent LBS!!!

Aside from the fact that they can drive you nuts, there should be something pretty obvious sticking out about this situation and I think a good LBS wrench would figure out what it is. (even if it's more than 1 thing)

P.S. And the "clicking" could be more of the derailer problem. Your derailer could be almost trying to shift but not quite and that will create a gnarly annoying noise. (I hate riding next to someone out of adjustment whose chain just grinds away at the side of the cog whilst barely being held in place by the der cage/wheels)
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