When should you move your saddle forward?
Determining Saddle Setback
Move the saddle forward or backward so your knee is over the pedal spindle when the crank is in the 3 o'clock position. Again, this is a good starting point, and then you can adjust your cleats fore and aft as needed.
What does moving your saddle forward do?
A good starting point for the fore-aft location of a saddle is the Knee Over Pedal Spindle (KOPS) rule. ... Moving the saddle forwards will open up the hip angles and by reducing any stretch to the bars, possibly relax the arms whilst putting more weight onto them.