Just how brittle are carbon frames?
I have a "friend" who came off a carbon framed bike. No obvious signs of damage but advised that the frame should be scrapped in case it has been weakened and could fail catastrophically without warning. So...every time a carbon bike is dropped the rider needs to buy a new frame? That can't be right can it. Surely it has some degree of resitance to impact. Would there be any tell tale marks on a carbon frame to show any excessive stresses on it?