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Old 02-10-09, 03:21 PM   #1
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BB size for Bianchi steel frame with Campy 10 speed

I'm converting a steel mid 80's bianchi to run a Campy 10sp drivetrain. I'm going to run a Chorus double crank and and cold set the rear spacing to fit the rear dropouts for a centaur 10 speed cog. It's currently set at 126mm spacing.
Can someone tell me how to figure out what size bb I need? Or maybe someone can just tell me?

It's a italian bb shell and I was going to pick up a 70x111 veloce cartridge unit, but I thought i'd ask first before I end up with a part I can't use..

ALSo, if I later go with a compact crank can I use the same BB?
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Old 02-10-09, 03:34 PM   #2
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Record and Chorus use a smaller BB width (102mm) than the 111mm centaur or veloce bottom bracket.
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Old 02-10-09, 03:37 PM   #3
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ok, so this needs a 102mm? Just wanted to make sure because I'm not exactly sure how old it is, or if maybe the older ones still used 102

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Old 02-10-09, 03:41 PM   #4
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the chorus BB is $92 where as the Veloce one is $37. Damn. If I do indeed need a 102 is there someone else that makes a 102, italian thread, for cheaper than $92?

or better yet, is the chorus crank compatible with any of the older style square taper bb's? Can I use any old 102mm square taper bb?
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Old 02-10-09, 03:44 PM   #5
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I'm not sure about compatability between the chorus cranks and older square taper BBs.
I'd ask that in the Mechanics forum.
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Old 02-10-09, 03:48 PM   #6
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Total Cycling has the Chorus bottom bracket for $58.
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