RideDNAOpen App

Position measurements

Stack and reach describe frame reference points, not saddle or handlebar position.

How to read stack

Stack is the vertical distance from the bottom bracket to the top of the head tube. A higher stack generally places the frame reference higher, but stem, spacer, bar and fit choices still change the rider's actual position.

How to read reach

Reach is the horizontal distance from the bottom bracket to the top of the head tube. Compare reach with stack, seat angle, effective top tube and the same frame size rather than using it as a standalone size recommendation.