Until I was 50, rode nothing but mtn.bike trails-from mild to wild. Now, at 72, only want to ride what might be considered a bit more than mild, but not real technical. A fall (not bike related) which ended up with a metal plate and 8 screws in my left wrist has me realizing that things break more easily now-or maybe I just fell exactly the wrong way-but not taking chances that it could be older bones.