i ride without one. i find they restrict my vision, and the fact is i'm petite enough that they hurt my neck.

i take other precautions, which include riding on the sidewalk and telling pedestrians to fuck off if they don't like it.

the bottom line is that if i end up thrown across three lanes of traffic and break my neck and rupture my liver, the fact that i didn't get a concussion isn't particularly relevant.

i'd rather spend my time being absolutely certain i don't get hit in the first place.

http://www.smh.com.au/national/health/neurosurgeons-claim-that-cycling-helmets-are-useless-is-highly-irresponsible-20140602-39d6o.html