Rear derailleur problems
I'm stumped. I took my bike to the LBS and they couldn't find a problem so maybe you folks can help.
My 9 speed Ultegra rear derailleur hesitates or doesn't shift when I'm shifting from cog 3 to 4, 4 to 5, 5 to 6, and sometimes 6 to 7. Same thing when going the other way. The cogs don't look worn. Happens on large and small chainring. This has been a problem for a few months. I've cleaned and lubed the drivetrain but it doesn't help. I've adjusted the cable tension and tried turning the small barrel adjuster (1/4 turn increments) near the rear der. The chain isn't stretched and has ~4000 miles on it. The bike has ~11,000 miles. Is the problem in the shifter? Is it time to change the chain even though it isn't stretched? Thanks for your help. |
Have you changed the cables and housings? May be time to replace the chain and cassette as well.
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Try cleaning the brifter
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My money's on gunked up cable housings, in particular the rear loop. Try cleaning or replacing housing and maybe cable. Should not cost you more than about $5 maybe a little more if the LBS does it. Try that before other more expensive solutions.
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I would check the cables and housing. I had the same problem a little while back and there was some crud buildup in the cable housing that was slowing the shift transition.
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Have you checked the derailleur hanger alignment? Bikes with 9 and 10 speed cassettes are more picky about derailleur hanger alignment than bikes used to be.
I doubt you have a cable or housing problem because that usually causes hesitation when shifting into a smaller cog but shifts normally when going the other way. |
I would defininitely check your derailleur hanger. my bike was doing the same thing. park tools has a derailleur hanger tool that'll bend it back into shape. maybe your LBS has one. if your hanger isnt replaceable, then that might be your best bet
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Thanks for the suggestions.
I replaced the cables about 500 miles ago. I'll check for a gunked up cable housing. Those weren't checked or replaced. :o |
Replace housing when you replace cables. Not a bad rule to follow and it's not gonna cost much more than doing cables alone.
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