Advertise on Bikeforums.net



User Tag List

Results 1 to 21 of 21
  1. #1
    Senior Member kblacy's Avatar
    Join Date
    Aug 2007
    Location
    San Antonio
    Posts
    78
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Shifting Problem

    For the last couple of rides I have had a problem downshifting into the middle cog on my 10-speed Ultegra cassette. I run a standard 12-25 cassette and keep it well lubed. It's only the middle cog and only when downshifting a single gear. If I do a 2-gear jump it works, but always hangs on a single. I've got the RD dialed in as but can't figure this out.

  2. #2
    Senior Member capwater's Avatar
    Join Date
    Dec 2004
    Location
    Quahog, RI
    My Bikes
    Giant TCR Comps, Cdale R5000, Klein Q-Pro, Litespeed Siena, Piasano 105, Redline Conquest Pro, Voodoo Bizango, Fuji Aloha
    Posts
    1,509
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    cables

  3. #3
    Senior Member dunningrb's Avatar
    Join Date
    Aug 2008
    Location
    Farmville, VA
    My Bikes
    Trek 5200, Scattante R-560
    Posts
    203
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    ^^^^ A bike shop can fix this in ten minutes, once they get to it. You can learn to do it yourself. Literally every bicycle on the road periodically requires this kind of adjustment.

  4. #4
    messenger
    Join Date
    Aug 2008
    Location
    WLA
    My Bikes
    pinarellos and a colnago
    Posts
    599
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    with your hand

    your shifters could be sticky--- a crushed cable guide or casing--- the housing (gears) could need replacing--- clean and lube.......pull the cable with your hand and feel the progression

  5. #5
    Senior Member onbike 1939's Avatar
    Join Date
    Dec 2004
    Location
    Fife Scotland
    My Bikes
    Airnimal Chameleon; Ellis Briggs; Moulton TSR27
    Posts
    1,891
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    This is usually caused by the cable sticking in the loop which leads down to the RD. Try some wd40 inside the cable and change the rear gears up and down the range. When the cable becomes free, oil the cable. To do the job properly of course you could dismantle the cable and outer, use WD40 to clean the outer, re-grease the cable, re-assemble and adjust the gears.

  6. #6
    Senior Member z415's Avatar
    Join Date
    Apr 2006
    Location
    Gainesville/Tampa, FL
    My Bikes
    Trek 1000, two mtbs and working on a fixie for commuting.
    Posts
    2,347
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rock ' n Roll cable magic is supposed to work wonders for this. Apply liberally at entry points and twirl your bike around and voila! (supposedly)
    Falling is learning...[SIGPIC][/SIGPIC]...learn to not fall in a box.
    Any good American will watch THIS -and- WHERE WAS MY BIKE MADE?

  7. #7
    messenger
    Join Date
    Aug 2008
    Location
    WLA
    My Bikes
    pinarellos and a colnago
    Posts
    599
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    wd 40 is not the wonder for cables and housing--- the plastic guide inside the housing melts--- it takes dirt with it down the guide and basically is only an emergency fix--- replace the housing with fresh plastic inserts--- shimano or campi --- the good stuff and a little phil grease--- works for me......

  8. #8
    messenger
    Join Date
    Aug 2008
    Location
    WLA
    My Bikes
    pinarellos and a colnago
    Posts
    599
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    to add--- unless the cable is rusty--- you need only mess with the casing and adjustment of slack--- cheap housing is cheap, sometimes all the housing can be dis-assembled while leaving the der connection--- bike shops get away with tune and cleans this way--- I would take the whole thing apart and learn ----

  9. #9
    Senior Member
    Join Date
    Feb 2005
    Location
    Oklahoma
    My Bikes
    Trek 5500, Colnago C-50
    Posts
    9,117
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    But don't take the shifter apart.

  10. #10
    Road Nazi Hunter Donegal's Avatar
    Join Date
    Jul 2007
    Location
    Slow! But Ahead of You.
    My Bikes
    Kuota Kredo, Litespeed Vortex, Aegis Victory, Burley Tandem, Cannondale Rush
    Posts
    409
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    If the problem hits while downshifting,, It is probably not just the cable since you are pulling the cable under a load from the shifter and it is a direct movement. If the cable was sticking, it would hesitate or not shift when shifting up. I had a similar problem with a campy 10 speed. I could hit every gear but it skipped back and forth on the center two gears. I had to re-time the entire cassette including opening up the limit screws. It was happening because the shifters were one detent off the way we had the timing set.

    Try to reset your derailleur from the beginning and see if you can hit all the gears.
    Rubber Side Down Racing Team
    My Other Home:http://DonGaleHomes.com

  11. #11
    Newbie
    Join Date
    Jul 2008
    Posts
    4
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by dunningrb View Post
    ^^^^ A bike shop can fix this in ten minutes, once they get to it. You can learn to do it yourself. Literally every bicycle on the road periodically requires this kind of adjustment.
    Were you referring to capwater's answer (cables)? If otherwise, please describe.

  12. #12
    Senior Member kblacy's Avatar
    Join Date
    Aug 2007
    Location
    San Antonio
    Posts
    78
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I was at the Hotter N Hell this past weekend and took my bike to the Shimano support truck for them to look at it. They only spent a couple of minutes with it since there were a million people there but the Shimano wrench was at a loss. Since both the chain and cables are new, I'm starting to wonder if there is a defect in the shifter. Has anyone had any problems with 10-speed Ultegra shifters like this?

  13. #13
    Senior Member DannoXYZ's Avatar
    Join Date
    Jul 2005
    Location
    Saratoga, CA
    Posts
    11,495
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by kblacy View Post
    For the last couple of rides I have had a problem downshifting into the middle cog on my 10-speed Ultegra cassette. I run a standard 12-25 cassette and keep it well lubed. It's only the middle cog and only when downshifting a single gear. If I do a 2-gear jump it works, but always hangs on a single. I've got the RD dialed in as but can't figure this out.
    What do you mean by "downshifting"? Moving from larger cogs to smaller cogs? If that's the issue, then it's definitely cable-friction of some sort.

  14. #14
    Senior Member kblacy's Avatar
    Join Date
    Aug 2007
    Location
    San Antonio
    Posts
    78
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by DannoXYZ View Post
    What do you mean by "downshifting"? Moving from larger cogs to smaller cogs? If that's the issue, then it's definitely cable-friction of some sort.
    No, moving from smaller to larger cogs.

  15. #15
    Senior Member DannoXYZ's Avatar
    Join Date
    Jul 2005
    Location
    Saratoga, CA
    Posts
    11,495
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    What levers, RD, #speeds, etc? It could be an adjustment and it could also be a case of mismatched parts.

  16. #16
    Senior Member kblacy's Avatar
    Join Date
    Aug 2007
    Location
    San Antonio
    Posts
    78
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I have Ultegra 10 speed levers, Ultegra RD, a 105 12/25 cassette, and a 53/39 chainring.

    I have also tried my other wheel which has a dura ace 11/21 cassette and it has the same problem in the same spot.

  17. #17
    Senior Member kblacy's Avatar
    Join Date
    Aug 2007
    Location
    San Antonio
    Posts
    78
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    So I've tried everything I can think of. New chain, cables, different wheel, even let my brother ride it. Same thing. I've decided to just send in the shifter and let Shimano warranty it. I sure hope this solves the problem.

  18. #18
    Senior Member z415's Avatar
    Join Date
    Apr 2006
    Location
    Gainesville/Tampa, FL
    My Bikes
    Trek 1000, two mtbs and working on a fixie for commuting.
    Posts
    2,347
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Maybe slightly bent hanger? I had the same exact problem on a MTB.

    Have you dropped your bike or put pressure on the RD/hanger lately? A LBS should be bale to do some magic and tell you if it is bent and then unbend it, if that is the problem.
    Falling is learning...[SIGPIC][/SIGPIC]...learn to not fall in a box.
    Any good American will watch THIS -and- WHERE WAS MY BIKE MADE?

  19. #19
    Senior Member kblacy's Avatar
    Join Date
    Aug 2007
    Location
    San Antonio
    Posts
    78
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I had my LBS check the hanger and they said it was spot on. This bike has been babied since day one. I had one guy tell me to just suck it up since it was only one gear that keeps missing, but to me it's akin to not being able to shift into third gear on your car.

  20. #20
    Senior Member kblacy's Avatar
    Join Date
    Aug 2007
    Location
    San Antonio
    Posts
    78
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    So my LBS has had my bike for the last week and called me to say they had the problem fixed. They replaced the cables (again), replaced the derailleur hanger, and lubed every moving part. I took it out last night on a different wheel and it's still skipping in the same place when i downshift. Please help.

  21. #21
    Senior Member
    Join Date
    Feb 2005
    Location
    Oklahoma
    My Bikes
    Trek 5500, Colnago C-50
    Posts
    9,117
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Well you could try shooting the shifter full of WD40, but if you plan to send it to Shimano don't do that.
    Plan B would be to return it to Shimano going through the dealer that sold you the shifter.

    Al

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •