Originally Posted by
sbarner
I took the Biopace chainrings off my '85 Fat Chance and dropped down to 175 mm cranks. I really did feel the difference in a less "choppy" pedal stroke and a smoother spin. Granted, that's all subjective and could be confirmation bias, but I wish I had done it long ago.
Were you running 177.5 or 180 cranks?
I was totally excited when I found some 170 XC Pro cranks...