Replacing BB Bearings
#1
Senior Member
Thread Starter
Join Date: Apr 2007
Location: Vancouver BC
Posts: 97
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
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
*
Join Date: Jan 2007
Posts: 3,458
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
Originally Posted by Benjamino
the locknut is fully threaded on to the cup
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
Senior Member
Join Date: Feb 2004
Location: St Peters, Missouri
Posts: 30,225
Bikes: Catrike 559 I own some others but they don't get ridden very much.
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1572 Post(s)
Liked 643 Times
in
364 Posts
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.
#4
Senior Member
Join Date: Nov 2006
Location: United Kingdom
Posts: 475
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
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.
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
Senior Member
Thread Starter
Join Date: Apr 2007
Location: Vancouver BC
Posts: 97
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
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.