We check the flexibility of the cyclist. Age plays a major role in this.This way we can check if there is not too much tension in the back muscles. In the lumbale zone as well as between the shoulder blades we check the muscle tension.Shortly, the drop of the cyclist depends on:1)Length of the upper body2)Length of the arms3)Flexibility4)Age
Ultimately the person himself will determine the height of the handlebar. We only give our recommendation.We have experienced that the most comfortable position for most of the cyclists, is when the body has an angle of 40°.