Originally Posted by
Helderberg
All good questions and I can only answer that I tried to measure consistently between the two bikes. The seats are different and I am trying to use the BB center as my point zero then run the ruler to match the angle of the seat post to set seat height. My crank arms are the same length so that is a constant. As far as pushing too high a gear I make my selection as to the load I feel in my bad knee without spinning out. I have been making a concerted effort be conscious of my rpm and knee/leg over the pedal and not splayed out. I also have to take into account the 47 years of wear and tear on my legs as a plumber so there is a definite base line I need to recognize.
Thanks again all for your input.
Be safe, Frank.
Frank, using BB center between two bikes is only valid if the crank arms are the same length. If not or you are in doubt, do more measurements to check how the arms compare or just change to measuring saddle to the pedal center. Should be obvious but also it should be said, we also need left to right matching as well as bike to bike matching. -- Ken