Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  

Go Back   > >

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.

User Tag List

Thread Tools Search this Thread
Old 05-27-11, 08:38 PM   #1
Senior Member
Thread Starter
downtube42's Avatar
Join Date: Oct 2008
Location: San Angelo, TX
Bikes: Volae Team, '76 Motobecane Grand Jubile, Priority Eight
Posts: 1,793
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 27 Post(s)
Drivetrain thump thump

On my last brevet, I noticed (heard and felt) a thump in the drivetrain when under power. It seems timed with crankarm position so I guess it's crank related not wheel or chain. I took it to the co-op where the mechanic checked the BB bearings for play and it seemed solid. We couldn't get it to happen on the stand. He suggested the cartridge might be loose in the shell (it's a Shimano Hollowtech Octalink). Unfortunately they didn't have the right tool to fit the lockring.

Question is, is his explanation plausible? If yes I'm tempted to buy the right tool and donate it to the co-op.
downtube42 is online now   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

All times are GMT -6. The time now is 11:17 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    get answers from real people!
Click to start entering your question.