Riding around SF is really all about knowing which streets are good for bikers. Many major streets with no hills have bike lanes (Valencia, Polk, Market, Embar

Riding around SF is really all about knowing which streets are good for bikers. Many major streets with no hills have bike lanes (Valencia, Polk, Market, Embarcadero, etc). I have not felt in danger of being hit by a car riding on those streets for the majority of my ride.