Originally Posted by
SurferRosa
How do you tell the difference between 41 date code (1988) Chorus and Athena cranks if the arms are 170mm (a size shared by the two groups)?
Not a joke. Really. I know it sounds like a setup to a dedicated, maybe horrible c&v joke, but I really don't know.
I believe Athena had self extracting crank bolts, Chorus did not. Going by memory, so I could be wrong.