Sorry to hear about your knees, Randy. Back when I cycled, I had friends who would ride only after they had received a semi-recent cortisone shot. I've always put that off, for no good reason really, but I couldn't take it anymore and had my first shot about 6 weeks ago, and I gotta say: I sure wish I hadn't gained 30+ pounds over the years, as my knee feels so good I feel like I could hop back on my road bike and whip out another century!