Has the quest for light helmets created unsafe helmets? Team Radio Shack alone has had 2 riders Jani Brajkovic and Chris Horner out with apparent concussions. Tom Boonen had to abandon because of concussion symptoms that occurred 2 days after his crash. Juan Soler may even have brain damage from hitting his head in this year's tour.
I know many of the professional riders count grams and examine wind tunnel data. Is it possible that the quest for lightness and aerodynamics created helmets that do not protect the professional riders?