What BB do I need?
11-09-07, 11:33 AM
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What BB do I need?
I have a Campy Chorus double chainset of unknown age that is nowhere near new. I want to install in on my 1984 Trek frame. Obviously I need an English threaded BB, but on-line I see both 111 mm and 102 mm widths are flagged for Chorus use. How do I tell which one I need?
Road Fan
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11-09-07, 11:35 AM
#2
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a picture of your crank would help. There have been a few cranks over the years to wear the Chorus badge.
11-09-07, 12:08 PM
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11-09-07, 01:30 PM
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I have a Campy Chorus double chainset of unknown age that is nowhere near new. I want to install in on my 1984 Trek frame. Obviously I need an English threaded BB, but on-line I see both 111 mm and 102 mm widths are flagged for Chorus use. How do I tell which one I need?
Road Fan
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11-09-07, 02:28 PM
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Typically with Record and Chorus, the 102mm is used for a double, and the 111 for a triple (both asymmetric and not interchangeable with Centaur and below). But my only experience is with recent vintage Campy square taper, and I don't know if the older stuff (say, pre-2000) is different.
.ed rader
11-10-07, 04:03 PM
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Ok, the left and right arms have 41 in a square on the backs, and I think I have a picture here:
The picture worked! I think this is an older Chorus. The cross-section of the arm is similar to that of my C-record, and very different from my recent 10-speed Record.
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11-11-07, 09:17 AM
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11-12-07, 07:08 AM
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Typically with Record and Chorus, the 102mm is used for a double, and the 111 for a triple (both asymmetric and not interchangeable with Centaur and below). But my only experience is with recent vintage Campy square taper, and I don't know if the older stuff (say, pre-2000) is different.
11-12-07, 07:10 AM
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