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

Reply
 
Thread Tools Search this Thread
Old 09-01-08, 11:09 PM   #1
bikemoner2k
Senior Member
Thread Starter
 
Join Date: Jan 2006
Bikes: '78 trek 530 w/ full 600 group, conversion atami '70s frame.
Posts: 66
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Shimano campy taper bottom brackets

My girlfriend took her bike into an LBS in seattle (recycled cycles) a few months ago to get her bottom bracket replaced. Just today she asked me to check out the clicking sound in her drivetrain and we realized that her fixed cup was loose. The flange on the outside of the cup was sticking out by about 1mm.
Clearly we have to tighten it, but the other thing that came out was that they sold her a shimano bottom bracket. She has a Campy victory crank (from the mid nineties). After telling her that she didn't need to worry about campy taper, they told her that it was a bottom bracket made by shimano with campy taper.

I'm under the impression that shimano has never made campy taper bottom brackets. Internet searches seem to agree. What do you folks think? Did shimano make campy compatible bottom brackets?

Thanks!
bikemoner2k is offline   Reply With Quote
Old 09-02-08, 01:21 AM   #2
dabac
Senior Member
 
Join Date: Mar 2008
Bikes:
Posts: 5,360
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
That's a so-so issue, and experiences from mix'n match experiments vary. I know I've gotten away with it once at least, but although the bb spindle was the same length I ended upp flipping it over to get the chain line right. There's a small difference in the taper that makes the cranks end up in a slightly different position.
dabac is offline   Reply With Quote
Old 09-02-08, 06:55 AM   #3
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
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: 28,776
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 36 Post(s)
The answer to your question is no, Shimano doesn't make ISO square taper bottom brackets so your LBS mechanic either lied or was mis-informed.

They were also remiss in that they didn't install the bb to the proper torque or it wouldn't have loosened. So you seem to be 0 for 2 with this dealer.

That said, as dabac noted, ISO and JIS tapers don't vary a lot from each other and often mix-and-match does work.
HillRider is offline   Reply With Quote
Reply


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 12:18 PM.