Originally Posted by
Road Fan
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
I hadn't considered the possibility of different crank lengths. Should have been obvious but then again I can be more than a little dense.
Frank.