[zbtaylor1]

Agreed. These are frame geometry measurements, not contact point measurements as they are sometimes described in the article. A small but important distinction.

The sentence: "Stack gives an indication of how tall or upright a frame’s cockpit is."

Should be more along the lines of: "Stack gives an indication of how tall or upright a frame’s cockpit can be."

Frame geo is very useful info but it's best to think of it as an indicator of a range of points in space wherein you can reasonably position your contact points.