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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.

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Old 04-04-08, 12:35 PM   #1
ross the boss
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Scott CR 1

The aluminum shell which hold the bottom bracket that is bonded into the carbon frame of my scott CR1 Limited frame came unbonded or unglued and has slipped out. A local bike shop told me it is not repairable. I purchased the bike used one year ago, have raced on it for this past year and love the bike. Any thoughts? Thank you.
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Old 04-04-08, 12:40 PM   #2
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Maybe contact Calfee? They work in carbon a lot.
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Old 04-04-08, 01:30 PM   #3
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JB Weld was used to glue the shell back into the CF fork head tube when the OEM
glue gave way when we tightened up the head set on the tandem. It has held
for the past 9mo. Slip the tube out, clean off all the old glue, ditto the inside of the
CF shell and coat with JB weld and slide it back in. Use enough to fully coat the
circumference of the tube and rotate the tube at least through a 180 while sliding it
in. Clean up the surplus and let harden. Calfee posts or responds on tandem@hobbes
so is likely available by phone for suggestions.
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Old 04-04-08, 01:36 PM   #4
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Quote:
Originally Posted by sch View Post
JB Weld was used to glue the shell back into the CF fork head tube when the OEM
glue gave way when we tightened up the head set on the tandem. It has held
for the past 9mo. Slip the tube out, clean off all the old glue, ditto the inside of the
CF shell and coat with JB weld and slide it back in. Use enough to fully coat the
circumference of the tube and rotate the tube at least through a 180 while sliding it
in. Clean up the surplus and let harden. Calfee posts or responds on tandem@hobbes
so is likely available by phone for suggestions.
This is the route I'd go. JB Weld is awesome with large surface-area applications like this. Archaeologists will dig up your frame's fossil, and wonder why there's a cylinder of JB-Weld in there, all by itself.
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