I agree with everyone else, you have much more power and weight with an MaB than you do on a bicycle, not to mention the speeds that some of these can get up to. I think bicycle helmets look horrible and am the last person that would wear one, but these deserve and where I am require more respect, I use a DOT certified skull helmet styled, isnt full mask and doesnt make me feel like i have a rock on my head, or feel like a motorcycle helmet, cost me 40$ at Scuderia West. I have since found myself very grateful to my helmet when I ended up in a fence because of some car...I along with most everyone here will recomend DOT helmets