Originally Posted by
Road Fan
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
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.