ofc kask chroni łeb przy upadku, ale nie chroni przed potrąceniem przez auta, a nawet przeciwnie - pojazdy mijają takich rowerzystów bliżej.
"Bicyclists who wear protective helmets are more likely to be struck by passing vehicles, new research suggests. Drivers pass closer when overtaking cyclists wearing helmets than when overtaking bare-headed cyclists, increasing the risk of a collision, the research has found."
https://www.sciencedaily.com/releases/2006/09/060911102200.htm