"I started racing, long distance touring and commuting by bike in 1969. Except for racing I never wore a helmet, including 2 bike trips across the US and one across Canada.
Ten years later, after losing two close friends in bike accidents and watching enough crashes in races, club rides and on training rides I gave helmets a second look. I started wearing a bike helmet. At this point my logic is, if I'm going to wear one I'm going to wear one on every bike ride. It's insurance against the unpredictable so why should I try to predict when I might need the bike helmet."