[seanmcdirmid]

Helmets are a lot less convenient than seatbelts. They have to be stored somewhere, locked to your bike hopefully, and people will still screw with them just because they can. Then you have to put it on your head and somehow get it to be comfortable and not mess up your hair before you arrive at work. None of this is really bad for American biking culture: biking is a serious affair with its own work out clothes with a probable shower if they are going to work anyways. It isn't like Amsterdam where you just kick off in your suit and arrive at work.