Interesting, and please do not take this as argument, we are just chatting. Since we both have a 86cm PBH JFYI, I use a 76cm saddle high measured from center of the BB to crown of saddle along the seat tube.

This also measure to a little more than 36.5 inches (175 crank) from the center of the pedal spindle to crown of saddle along the seat tube.

Switching to generic response-----

Like I said, there are exceptions, but the 109% rule is a very OLD, going back at least to the early 70s. It is not exact, it is a starting point to work up or down from. Nonetheless, anyone who is significantly different from what this calculation would predict is highly likely not really at their optimal setting for best power.

You guys are making this out complicated, the 109% Rule is much more simple than the heel on the pedal rigamarole. Depending on what shoes I wear or not significantly varies the heel on pedal method as does the tendency to rock and over extend/hyper extend, it really is a poor method for getting consistent fit. But, I am an engineer and a ex working scientist so I like math, simple and always the same starting point.