Originally Posted by Road Fan View Post
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 just spent an hour comparing BB to saddle length and from peddle axel with crank arm parallel to seat post measurements and you nailed it. The bikes have different crank lengths and putting the crank arm in line with the seat post showed a measurable difference. I then compared left to right side of each bike and that was within a 64th. I did not get out on the bikes to test tonight but I will ride them tomorrow. Thanks again for you help with this aspect.
Frank.