I have been trying to fit my girl friend on her bike for a while now. We are finishing up college, which is why we have not spent the big money on an intense bike fit yet.
The problems I am seeing. Her hips rock, no matter what I do. Over the past 2 years we have moved her saddle up and down all with no change. Recently checking her knee over spindle, we found out that when her right knee is over spindle, her left knee is about 2cm behind the spindle given the same saddle position. She does not seem to have a leg length difference, she was a competitive ncaa cross country runner for a while, with no known issues. I think this may point to why we have hip rocking. Any thoughts on what could be causing this?