3 ms·The rider must also wear a helmet.by rocky1138 9y agoThe rider must also wear a helmet.spadros 9y agoWell, yeah. You should always wear a helmet, though!sporkland 9y agoThat type of attitude may actually endanger cyclists more than helping them. http://www.bmj.com/content/360/bmj.k94/rr-2 http://www.bmj.com/content/360/bmj.k94/rr-2