Hi Ed,
I have a cardiac history and my surgeon excludes a bilateral procedure for those with my history, so it will be the right knee for now. He -- and me too -- is perplexed that my n=bone on bone knee is less problematic than the other knee that still has cartilage.

This is part of aging for some of us who cycle and my point is sharing my experience and decision making will be some input for others who may be in the same position in the future. Cycling is vey important to my physical and psychological health and whatever I can do to continue cycling in the future, I need to do.

Thanks again for your responses.