I rode in Denmark and never wore a helmet. I now ride in SF and always wear a helmet. My justification is that I'm shit scared of being hit by a car here - a pr

I rode in Denmark and never wore a helmet. I now ride in SF and always wear a helmet. My justification is that I'm shit scared of being hit by a car here - a problem I didn't have there. Once cyclists reach a critical mass, I imagine that motorists become accustomed to it and accidents with cars becomes less of a problem. Whether a helmet actually helps in those cases is another issue, but at least it makes my mom happy :)