Advertise on Bikeforums.net



User Tag List

Results 1 to 7 of 7
  1. #1
    Senior Member
    Join Date
    Mar 2011
    Location
    Seattle
    Posts
    89
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    internal shift cable question

    Hi. My rear shift cable goes through the chain stay. It looks like there is a plastic sleeve that goes the entire length of the tube because I was able to thread a new cable through with no problem. My derailleur shifts to smaller gears very slowly, so I was wondering, how do I replace the internal cable housing thing? Does that thing have a name? Thanks.

  2. #2
    Senior Member
    Join Date
    Sep 2004
    Location
    boston, ma
    Posts
    2,707
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    housing ends reamed and capped properly? rear housing loop length? the stock length will be short. what components? it would be called and internal cable guide or something similar. probably need to contact the frame manufacture. hanger alignment should also be checked and maybe a little less tension will help

  3. #3
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    24,813
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Is this an older Trek frame? If so, there is no internal sleeve but a funnel at the exit end of the chainstay that guides the cable end to the hole which is why you had no problems installing it. It can't be changed.

  4. #4
    Senior Member
    Join Date
    Mar 2011
    Location
    Seattle
    Posts
    89
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Oh… It is indeed an old trek frame. At least I don't have to look for some obscure part now.

  5. #5
    bike whisperer Kimmo's Avatar
    Join Date
    Dec 2009
    Location
    Melbourne, Oz
    My Bikes
    - - - - - - - - - - - - - - http://velospace.org/node/36949 http://velospace.org/node/47746 http://velospace.org/node/47747
    Posts
    6,529
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    Sounds like some worn or damaged cable housing has too much friction going on. You can usually feel where the problem is by poking a cable through your bits of housing.

  6. #6
    Senior Member
    Join Date
    Mar 2011
    Location
    Seattle
    Posts
    89
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I don't think it's the housing because I just replaced it and the cable. I need to do more investigating though to make sure the cable is moving freely.

  7. #7
    bike whisperer Kimmo's Avatar
    Join Date
    Dec 2009
    Location
    Melbourne, Oz
    My Bikes
    - - - - - - - - - - - - - - http://velospace.org/node/36949 http://velospace.org/node/47746 http://velospace.org/node/47747
    Posts
    6,529
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    There are some crucial considerations to observe when fitting cables.

    1. When cutting housing, make sure the hole hasn't been flattened, and use something sharp to ensure the crushed lining is opened up to a flare.
    2. Housing ends need to be ground flat, preferably with ferrules fitted.
    3. Housing length matters a lot - you need to determine the length that maximises the radius of all bends. Many bikes have a loop at the derailleur that's too short.

Posting Permissions

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