I am working on an old Italian bicycle--an Olmo Deluxe. I'm guessing it's from about 1961. I bought it quite a while ago and removed the chainset and BB...........(for reasons unbeknown to me now.)
Anyhow, I am trying to fit the bike with one of my older used Campagnolo BB's. The bike is of course Italian and I double checked with a caliper that the BB shell width is indeed 70mm end to end. That said, I rooted through my old spindles and found a decent Campagnolo Record spindle engraved "70-SS."
Given that there is not a "120" stamped to the right of the "SS" I thought I better consult my Sutherland's Fifth Edition handbook as to which cups I should use--Thick rifled style OR Thin standard style with the 70-SS marked spindle. There is page after page of charts and I can hardly make sense of any of this. It looks as if the thick and thin cup substitutions/factors may have something to do with chainline.
My question: How does one determine which cups (thick or thin) are correct for use with this spindle in the old bicycle?
I checked the archives by typing in "Campagnolo BB cups" but only about five posts came up.
Don't everybody answer at once now..........
Ted Baer
Palo Alto, CA