Quote Originally Posted by bcipam
If you switch out for a more setback post, you may have to adjust your handlebar stem (make it shorter).
You don't want to necessarily do this or assume that you can make the stem shorter to compensate for the increase in setback. If you get a setback you need to examine how this saddle position change affects your knee-pedal position (the position will vary with body structure, pedaling style, and types of events in which you compete).