The only thing I know is through Nora, my wife, who has had 3 meniscus tears, and now 2 TKR's. One of the cautions she received is that the knee might "lock up" and become immovable. I have no clue whether or not that really happens - it never did with her. She rode for about 3 years after her first meniscus tear - no repair - on her right knee. Then the terrible tear she had a few months back led to the TKR.

Sorry, wish I had more info.