I have a Zeus crankset from the early 80s ('81, I believe), I was
under the impression that it was a 118mm... I can fit some 120mm
rings on it by pushing way too hard, and I've used some that I filed
about half a mm off the 5 spots on the inner ring where it slips over
the crank arm lip... and not filed the holes, ever... I bought it
new in 82 with a 36 tooth and a 56 tooth... ! for quite a while I
ran it as a 7 speed with just the 36 on front and one of those 9-11-13
cogs-clusters from moulton on a suntour new winner (9-11-13-15-18-22-28)
freewheel, I loved it that way.
Thomas Seaman
Portland, Oregon