Thing is, I should probably be most worried about heart disease, but because I bike to and from work, that's not a major risk factor for me.
Traffic injuries/fatalities are more likely if you bike, cariovascular disease is less likely if you bike. I suspect my overall annual risk of mortality drops when I make the trade-off, as my bike commute isn't along any particularly dangerous roads.
(I don't think biking without a helmet is better than biking with, as the title suggests, but I wouldn't be surprised if helmet laws/media campaigns are harmful.)
Traffic injuries/fatalities are more likely if you bike, cariovascular disease is less likely if you bike. I suspect my overall annual risk of mortality drops when I make the trade-off, as my bike commute isn't along any particularly dangerous roads.