Shifting Problem
Results 1 to 9 of 9
  1. #1
    RoadBikeReview Member
    Reputation:
    Join Date
    Jan 2015
    Posts
    3

    Shifting Problem

    I have a Cannondale XR800 bike with a 53t large chainring and a 11-32 9 speed rear cassette. It has a Shimano 105 rear derailleur, but i have no idea what year or size cage. I can't shift into the two largest cogs on the rear cassette when I'm using the 53t chainring. It looks like the derailleur is too short. Would a long cage derailleur solve this issue, or is there something else I can do? Any help would be appreciated!

  2. #2
    'brifter' is f'ing stupid
    Reputation: cxwrench's Avatar
    Join Date
    Nov 2004
    Posts
    15,281
    Without knowing more details, no way to know. If the rear derailleur is 9 speed 105 there is no way it will ever work properly. A long cage derailleur won't make it work any better. What you need is a mountain bike derailleur. Any Shimano that isn't 10speed (Dyna-sys) will work as long as you are inside the capacity of the derailleur, meaning you should be fine w/ a medium cage (XT M772-GS). This has been discussed dozens and dozens of times on this forum, try searching next time.
    #promechaniclife

  3. #3
    tlg
    tlg is online now
    RoadBikeReview Member
    Reputation: tlg's Avatar
    Join Date
    May 2011
    Posts
    17,830
    Quote Originally Posted by wkumtrider View Post
    is there something else I can do?
    Compact crank and a smaller cassette.
    Custom Di2 & Garmin/GoPro mounts 2013 SuperSix EVO Hi-MOD Team * 2004 Klein Aura V

  4. #4
    RoadBikeReview Member
    Reputation: JCavilia's Avatar
    Join Date
    Sep 2005
    Posts
    14,713
    I can't shift into the two largest cogs on the rear cassette when I'm using the 53t chainring. It looks like the derailleur is too short.
    I'm not sure what you mean by "can't shift". If you mean it jams because the derailleur cage is stretched all the way forward so there's no more slack in the chain, then your chain is too short, regardless of whether you have a suitable derailleur.

    On the other hand, if the derailleur just stops moving inboard even but there's still slack in the derailleur cage, then you have a adjustment issue (limit screws and/or cable adjustment) that must be addressed first.
    "None of us knows for sure what's out there; that's why we keep looking. Keep your faith; travel hopefully. The universe will surprise you, constantly." The 13th Doctor.

  5. #5
    RoadBikeReview Member
    Reputation:
    Join Date
    Jun 2005
    Posts
    673
    I guess it's also possible that your chain is too short. It might be that your low end limit screw is too tight, but then it wouldn't shift in the small ring either. A final possibility is that the cable is just waaay too tight.

    However, I believe that the capacity for a SS rear mech is 27 or 28 teeth, so the longer cage might be the best solution.

  6. #6
    'brifter' is f'ing stupid
    Reputation: cxwrench's Avatar
    Join Date
    Nov 2004
    Posts
    15,281
    Quote Originally Posted by TiCoyote View Post
    I guess it's also possible that your chain is too short. It might be that your low end limit screw is too tight, but then it wouldn't shift in the small ring either. A final possibility is that the cable is just waaay too tight.

    However, I believe that the capacity for a SS rear mech is 27 or 28 teeth, so the longer cage might be the best solution.
    While the chain may be too short, a long cage derailleur of anything but the most recent vintage will NOT help the OP's situation.
    #promechaniclife

  7. #7
    RoadBikeReview Member
    Reputation:
    Join Date
    Jan 2015
    Posts
    3
    Quote Originally Posted by JCavilia View Post
    I'm not sure what you mean by "can't shift". If you mean it jams because the derailleur cage is stretched all the way forward so there's no more slack in the chain, then your chain is too short, regardless of whether you have a suitable derailleur.

    On the other hand, if the derailleur just stops moving inboard even but there's still slack in the derailleur cage, then you have a adjustment issue (limit screws and/or cable adjustment) that must be addressed first.
    Hi JCavilia, it jams because the derailleur cage is stretched all the way forward. I was thinking a longer chain would work. Thanks for the response.

  8. #8
    'brifter' is f'ing stupid
    Reputation: cxwrench's Avatar
    Join Date
    Nov 2004
    Posts
    15,281
    Quote Originally Posted by wkumtrider View Post
    Hi JCavilia, it jams because the derailleur cage is stretched all the way forward. I was thinking a longer chain would work. Thanks for the response.
    It may, you'll have to put one on to know for sure. In this case you're outside of the 'capacity' of the derailleur so I'd recommend sizing the chain big/big so you know for sure it's long enough. You might have to deal w/ a little slack in the small ring/small cog(s) to get it to work on the opposite end.
    #promechaniclife

  9. #9
    RoadBikeReview Member
    Reputation:
    Join Date
    Jan 2015
    Posts
    3
    Thanks cxwrench. I need a new chain anyway. I will give that a try and see how it goes.

Similar Threads

  1. Shifting problem
    By kingpin in forum Components, Wrenching
    Replies: 8
    Last Post: 09-02-2013, 01:31 PM
  2. Shifting Problem...Please Help
    By StillRiding in forum Components, Wrenching
    Replies: 14
    Last Post: 10-21-2009, 08:20 AM
  3. DT shifting problem.
    By Kuma601 in forum General Cycling Discussion
    Replies: 3
    Last Post: 10-03-2008, 08:10 AM
  4. Help ID Shifting Problem
    By campguy71 in forum Components, Wrenching
    Replies: 1
    Last Post: 09-18-2008, 03:12 PM
  5. Help...Problem with shifting
    By claycrusher13 in forum Beginner's Corner
    Replies: 8
    Last Post: 12-31-2006, 05:53 AM

Posting Permissions

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

THE SITE

ABOUT ROADBIKEREVIEW

VISIT US AT

© Copyright 2020 VerticalScope Inc. All rights reserved.