Originally Posted by
datlas
I believe best reference point is top of pedal/bottom of shoe. That is what I am calling pedal stack (how much above midline of crank). And pretty sure it’s a circle with center stack above bottom bracket center, as stated in initial post.
"center stack above bottom bracket center"??
The rotation is around the center of the bottom bracket axel.
If it was a circle, A, B, C would have to be the same length.
It appears A > B > C.