Marc Boral wrote:
> I seem to remember the OS cups designated with a "5". So an
> English cup would read 1.375 instead of 1.370, and an Italian
> would read 36.5 instead of 36. I'm not 100% sure on this, maybe
> I just dreamed it, but I have sold them in the past, and I still
> have some here. They're buried so I can't just grab em to look at.
I do believe the OS cups were 0.5mm oversized according to the Campy catalog, so an Italian would be 36.5, but a half millimeter is 0.020". 1-3/8" = 1.375" nominal; actual measure about 1.370". So OS would be 1.395" nominal or 1.390" actual. This is all theoretical, not from measuring any real OS cups - I've heard of 'em but I don't think I've ever actually seen one, much less measured one.