OK that makes sense. I had heard that the crank with the extra machined "bumps" where they crack (where the main arm meets the spider arms) was a special warranty replacement arm. The first two bikes I looked at in my basement had the 11, with groove but no bumps. Then I spotted another 11, on a crank WITH bumps but no groove! So it looks like they made the 11-in-a-square cranks in more than one year. Unless both groove/no bumps and bumps/no groove were made in the same year?
Mark Bulgier Seattle, Wa USA
Keith Kessel writes:
>
> I think that code represented a late run of the Super Record
> cranks that was sent out for warranty replacement.
>
> >From: Mark Bulgier
> >
> >So what does it mean when there's an eleven (11) in a
> >square? This is on a grooved arm, so not late Super Record
> >of the smooth non-grooved variety.