Originally Posted by
Doc V
When you walk or stand do your feet point out, in, or straight? If they are not straight and your pedals have no float, then your feet are being pushed in an unnatural angle. I would also definitely check seat height as the others have suggested.
Saddle position is always a potential place where problems can occur. What's really new with a clip less pedal is that the foot is fixed at a rotation angle or only has a limited range of angles. These might not be in the acceptable range for your knee, and that can lead to pain and even to knee injury. Fitting systems use either a "Rotational Adjustment Device (RAD)" or other cleat-focused system to set the cleat angle at one that will not damage your knees. Without experience I would not adjust cleats myself. Maybe fore/aft, but only if I could make sure the cleat angle was not changed.
For setting up cleats the first time, why not get some help?
I'm surprised the shop selling the shoes did not offer assistance with setup.