Originally Posted by
cubewheels
Your right leg might not be working as hard as your left leg without the shim so your left had to work harder.
Try reducing saddle height by 3 to 5 mm see if that improves the situation.
What will that accomplish? The leg length differential will still be present, and unaddressed. Lowering the saddle might get the shorter leg in "position," but then the longer leg is out of "position." The fix without another fitting is to shim the cleat on the shorter leg to get the pedal/cleat to saddle length equal.