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Installing Campy BB, need to face shell?

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Installing Campy BB, need to face shell?

Old 06-29-08, 12:09 PM
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lukasz
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Installing Campy BB, need to face shell?

I bought one of those bikesdirect Motobecane SL frames used and ordered most of a Campy group for it. The frame previously had a SRAM group on it, including the external BB. Should I be worried about needing to face the BB shell? My thinking is that since there was already an external BB on the bicycle, the shell should be adequately shaped for the Campy BB. Thoughts?

Last edited by lukasz; 07-01-08 at 10:06 PM.
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Old 06-29-08, 12:25 PM
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there is no need face the BB if you are going to use a external unit.
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Old 06-29-08, 12:36 PM
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The instructions specifically call for it though.
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Old 06-29-08, 12:51 PM
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is there wear on the cups or bearings if not then there nothing to worry about . if there is then yes it need to be done . but since you are talking about external then usually there no need for it because the external handle the stress which is a problem for the older BB sets.
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Old 06-29-08, 01:33 PM
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Originally Posted by lukasz View Post
The instructions specifically call for it though.
When a frame is first built by the frame builder or factory, the BB shell needs to be faced and have the threads chased. The steering head also needs to be squared and reamed. Maybe even the seat tube. Most over-the-counter mass produced frames didn't have this done to save cost and it was up to the bike shop that built the bike to do it. That's probably why it says to do it in the instructions.
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Old 07-01-08, 05:49 PM
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Originally Posted by OLDYELLR View Post
When a frame is first built by the frame builder or factory, the BB shell needs to be faced and have the threads chased. The steering head also needs to be squared and reamed. Maybe even the seat tube. Most over-the-counter mass produced frames didn't have this done to save cost and it was up to the bike shop that built the bike to do it. That's probably why it says to do it in the instructions.
Wouldn't a bikesdirect frame be the definition of an over-the-counter mass produced frame? Or are we talking Wal-mart here?
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Old 07-01-08, 05:55 PM
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Originally Posted by lukasz View Post
Wouldn't a bikesdirect frame be the definition of an over-the-counter mass produced frame?
Yes. But you say that a BB is already installed, so the work would have been done.
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Old 07-01-08, 07:48 PM
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Assuming the SRAM bottom bracket lasted adequately and had no signs of distress, the the bb shell should be good to go. If the SRAM bb died a premature death then I'd have the shell faced. External bbs are less tolerant of shell misalignment than cup-and-cone or internal cartridge types.
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Old 07-01-08, 08:01 PM
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Originally Posted by OLDYELLR View Post
Yes. But you say that a BB is already installed, so the work would have been done.
And you know it was faced how?
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Old 07-01-08, 08:10 PM
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Originally Posted by operator View Post
And you know it was faced how?
I guess I don't but I assumed the OP bought the frame new with the BB professionally installed. I could be wrong.
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Old 07-01-08, 10:06 PM
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The SRAM BB came installed on the bike. I installed the Campy BB myself. I can ask the previous owner if he had any trouble I suppose. I'll be taking the frame to my LBS on Thursday to get it checked out - can't hurt (except my wallet).
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Old 07-02-08, 12:37 PM
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I'd say if it already had a BB installed, you're probably fine. Worst case scenario: you kill a BB a little early in it's life.
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