Advertise on Bikeforums.net



User Tag List

Results 1 to 5 of 5
  1. #1
    Senior Member Benjamino's Avatar
    Join Date
    Apr 2007
    Location
    Vancouver BC
    My Bikes
    Lemond Poprad, Velosport Appalache
    Posts
    87
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Replacing BB Bearings

    I recently replaced the caged bearings in my adjustable Bottom Bracket with loose bearings under the advice of a LBS Mechanic and the Sheldon Brown website. Installation went smoothly as I was using fairly thick grease which held the bearings in place during the install, but the adjustable cup is now threaded in further than it was before and as a result the locknut is fully threaded on to the cup. Did I do something wrong, or do I need a slightly longer spindle?

  2. #2
    * vpiuva's Avatar
    Join Date
    Jan 2007
    Posts
    3,458
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Benjamino
    the locknut is fully threaded on to the cup
    This doesn't sound like a problem

    I'm assuming what you're saying is that the adjustable cup is now fully threaded into the BB shell and you can not install and/or tighten the lockring. That sounds like you've used the wrong size bearings.

    A change of spindle length will not solve your problem no matter what the issue is.

    A pic might help if I'm just not getting it.

  3. #3
    Senior Member Retro Grouch's Avatar
    Join Date
    Feb 2004
    Location
    St Peters, Missouri
    My Bikes
    Rans Enduro Sport, Hase Kettweisel Tandem, Merin Bear Valley beater bike
    Posts
    23,100
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Benjamino
    but the adjustable cup is now threaded in further than it was before and as a result the locknut is fully threaded on to the cup.
    Are you sure that you got the exact same size balls as were on the original? It sounds to me like you might have gotten some that aare a little smaller.

  4. #4
    Senior Member Cadfael's Avatar
    Join Date
    Nov 2006
    Location
    United Kingdom
    Posts
    475
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I am assuming the OP has done a typo and means the lockring is NOT fully threaded onto the cup?

    If your BB is a standard one, you may need 1/4 inch ball bearings, it does sound like your new bearings are to small. Line up four together and check there is four to an inch.

  5. #5
    Senior Member Benjamino's Avatar
    Join Date
    Apr 2007
    Location
    Vancouver BC
    My Bikes
    Lemond Poprad, Velosport Appalache
    Posts
    87
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Sorry for the typo, the locknut is not fully threaded. The LBS said that they were 1/4 inch when I asked if they would be compatible with my BB. 11 do fit neatly in a circle in the cup. It is a mid 80's Nishiki with the original BB. We both assumed that it would be a standard size. Maybe I'll have to take her in and have them look at it. Thanks for the replies.

Posting Permissions

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