Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

BB Woe!

Old 08-07-23, 05:57 AM
  #1  
Senior Member
Thread Starter
 
Join Date: Dec 2011
Location: NE Ohio
Posts: 2,601

Bikes: 1992 Serotta Colorado II,Co-Motion Speedster, Giant Escape Hybrid, 1977 Schwinn Super Le Tour

Likes: 0
Liked 112 Times in 85 Posts
BB Woe!

So a Specialized Roubaix came into the shop the other day. The fellow said the DS external bearing cap was rotating. After pulling the crankset set I find the threaded portion has sheared off and the internal and external are 2 pieces!
After a call and some pics sent to Praxis a new BB ,free of charge, is on it's way.
Has anyone seen this situation before?
Tandem Tom is offline  
Old 08-07-23, 07:44 AM
  #2  
aged to perfection
 
mpetry912's Avatar
 
Join Date: Jun 2009
Location: PacNW
Posts: 1,897

Bikes: Dinucci Allez 2.0, Richard Sachs, Alex Singer, Serotta, Masi GC, Raleigh Pro Mk.1, Hetchins, etc

Liked 1,317 Times in 698 Posts
you mean the BB's shaft, the thing the bearings are mounted to, broke into two pieces under the bearing ?

/markp
mpetry912 is offline  
Old 08-07-23, 11:04 AM
  #3  
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,193

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB

Liked 3,998 Times in 2,377 Posts
Yes. I've seen both cup and cone loose ball cups break between the threaded skirt and the inside ball track as well as an external BB also with the threaded skirt broken from the rest of the cup. Not common but does happen. Good for Praxis to back you up. Andy
__________________
AndrewRStewart
Andrew R Stewart is online now  
Old 08-07-23, 09:18 PM
  #4  
Senior Member
 
oldbobcat's Avatar
 
Join Date: Jul 2005
Location: Boulder County, CO
Posts: 4,464

Bikes: '80 Masi Gran Criterium, '12 Trek Madone, early '60s Frejus track

Liked 479 Times in 361 Posts
Never had a customer keep riding that long after the bearing stopped spinning.
oldbobcat is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Your Privacy Choices -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.