Originally Posted by cudak888
Was that revision done before or after the CSPC mandated changes? I have an early '80s NR/SR crankset on my '61 Paramount, and it seems to have the same sharp edge as the earlier crankarms.
Well, according to coelcanth, the removal of the fluting was to combat the pedal-eye failure as a result of toe-straps wearing off the aluminum/causing microcracks on these same cranksets. -Kurt
The elimination of the crank arm flute milling was in concert with the added material behind the spyder arm junction. Campy cranks were lathe turned prior on th eback side, these later cranks, by this time Super Record only were CNC milled to get the shapes desired.
Did it eliminate the problem? probably, but soon thereafter Super Record stopped production.