I don't know...I currently have THREE friends with broken bones. 2 with badly broken wrists and 1 with a fractured collarbone. I think a lot of it has to do with how/why a person falls. All of my falls (mtn. and road) have been low-speed topples that mainly leave me with lower body bruising. My friends who have busted wrists (one has broken hers twice) likely tried to break their falls with their hands...it's instinctive for a lot of people. Somehow I never reach out when I am falling...I hang onto my bike for dear life (perhaps to protect the bike--I think I care about my bikes more than my body, heh). This is a good thing, I guess. Both of my friends with wrist fractures need surgery. One has already had surgery and things aren't healing, so she needs another surgery. She already has 2 Ti plates.