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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 05-12-10, 06:19 PM   #1
monbert
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need help for the right bottom bracket

hi all. i need help in determining the right bottom bracket for a weyless carbon crankset. i know they don't make this anymore but i do want to know what type of BB should I get. I'm setting up a Giant TCX to a SS. I have some pics of the crankset so hopefully I can get some help from you all. I went to my LBS and the mech. told me it was an ISIS BB but I don't think so. I think it's an octalink but I don't know if it's a V1 or V2. any help is greatly appreciated! thank you very much!

~i can't attached a pic for some reason but if you give me your email address i can email it to you. thanks again!~
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Old 05-12-10, 08:16 PM   #2
operator
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Take the crankset to a shop that stocks octalink and ISIS bbs and try them if convenient. I highly doubt it uses octalink.
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Old 05-13-10, 02:04 AM   #3
meb
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Quote:
Originally Posted by monbert View Post
hi all. i need help in determining the right bottom bracket for a weyless carbon crankset. i know they don't make this anymore but i do want to know what type of BB should I get. I'm setting up a Giant TCX to a SS. I have some pics of the crankset so hopefully I can get some help from you all. I went to my LBS and the mech. told me it was an ISIS BB but I don't think so. I think it's an octalink but I don't know if it's a V1 or V2. any help is greatly appreciated! thank you very much!

~i can't attached a pic for some reason but if you give me your email address i can email it to you. thanks again!~
Here's pics from Sheldon's site on Octalink 1, Octalink 2 & ISIS.
http://www.sheldonbrown.com/gloss_u-v.html#v1
Octa is derived from 8, so count the splines if it is 8 it's Octalink unless this is a BMX crank, if there are 10 it likely is ISIS.
If the mech told you an 8 spline BB is ISIS that tells you something about his knowledge of bikes and suggest you find another bike shop.
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Old 05-17-10, 05:26 PM   #4
monbert
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thanks for the sheldon link and i counted 8 splines so it's def. an Octalink...i can't believe the mech guy didn't know what he was talking about and the LBS is a known dealer around my area...guess i do need to find another bike shop then. thanks for all your help!
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