I wanted to respond to this. I as well had a bum knee replacement 7 years ago. I loved riding my bike. I found the following : http://www.orthopedal.com . We ordered this and installed it on my bike and it helped and continues to help. Our local bike shop was also aware of this little contraption you put on your pedal. I recently chose to be proactive and not wait for as much loss or damage to the other knee. January 8, 2024 was my other knee replacement. It has been successful even though I am still in physical therapy working on it. Good luck, hope this helps.