This is one of the oldest and most accepted methods of determining correct saddle height. The math varies slightly depending upon the source. The method usually has you take a hard back book, about one or two inch binder, and standing in stocking feet, back to a wall, have a helper push upward on the book until it nearly hurts and then the helper puts a pencil mark on the intersection of the book with the wall. This is your PBH (pubic bone height) or also known as your CYCLING inseam. Mine measures 86cm, I subtract 10 and get a saddle height of 76cm. I use this on every bike I have.

Just because somebody has never heard of something does not mean it is not valid.

LC