Originally Posted by
squirtdad
thanks bianchigirl the crank is an Ofmega Cometizone circa 83/84 so it is ISO. The older ofmegas had the really small unique to ofmega (and avocet) spindle taper...... the cut off in years is totally unclear.
I also checked the bb that came with the bike was JIS you can see where the spindle stopped on the crank....right at the 4.5 mm sheldon notes.
so the Miche looks like an option or find a used campy or ofmega cone and cup
I also once had a Ofmega Compitizione from around that era and IIRC it was a completely fine match to a Campy BB spindle, plus any of the clones from Galli, Gipiemme, Sugino MIGHTY (no others), and Avocet should also work for a regular "open" BB...they should all be ISO.
I see that Sutherlands lists all the USA Avocets (as distinct from Ofmega, even tho they were the mfgr.) as ISO and not as the unique Ofmega taper/end size.
That BB that BG linked is a great deal for a LATE Campy BB, with ceramic bearings no less, but since it's only available in 102 it won't work for your older crank,
AFAIK.