Actually riding a bike in San Francisco is less dangerous than crossing the street. So wear a helmet if you feel safer, but don't criticize cyclists who dont wear them. Mandatory helmet laws reduce the number of cyclists on the road. There's a tremendous correlation between lots of cyclists and bike safety. Also riding two abreast in conditions that allow this is a truly delightful civil way of enjoying a city. I ride my bike on the same route as this clip every day in all kinds of weather. My bike is pretty clean, but it's black. The more we can make cycling hip, fun, safe, affordable and fashionable, the more people will WANT to cycle. Frankly i wish there were thousands more cyclists like the ones on this short clip riding SF streets. It would make the cycling exoerience in my town even safer and more enjoyable. Thanks for posting and enjoy your ride.

even going ten miles an hour a head injury can be fatal of not life changing.

I made no mention of mandatory laws, but it's irresponsible to model stupid behaviour. That'a what they are doing here.

And you get to tell me what not to say when you can bring my father back to life, from dying in a motorcycle crash, in part because he was not wearing his helmet. fucking seriously.
Again, it's irresponsible to model stupid behaviour.