I had this thread in Mechanics earlier, but I think this might be a better place. I'm still confused.
I have an early Chorus crankset that I want to put on my Trek 610 to try a 172.5 arm length. I need a BB. I know it needs an English thread.
Speaking to Vecchio's, I'm told if it has an engraved shield logo, it is 1993 or earlier, and it needs a 111 mm BB with symmetrical ends. The Centaur BB and the AC-H 111 are examples of a good fit. Mine has a printed shield logo, but no word "Chorus" with the arm length. It also has the date code "41" engraved in a square. C-record BBs should also work in this case.
I also read on Branford's website that if it's before 1995 it can use those parts, but if it's later it needs a 102 mm BB. However, I don't know how to tell if it's from the 102 mm era or definitely in the 111 era? Can anyone help with this?
In the previous thread I posted a picture and, was told I have a first generation crankset. However, my parts do not have an engraved shield logo.
Can anyone help me straighten this out and decide what to buy?