It is totally beyond my comprehension why all bicyclists dont use rear view mirrors. In my way of thinking they are as essential as mirrors on an automobile. They are so ridiculously cheap that you can economically try them all till you find the one which works for you best. It is extremely important to me to know what might be coming up on me whether it be a car, a school bus, a semi or a Rotweiller. On the road, I want the best odds I can muster for survival. A rear view mirror is one more tool to make my odds just a little better. For the record, I am not a safety freak. I enjoy a tight group ride or a 20 mph pace line as much as anyone. I just need to know what is going on around me. That ability makes my ride so much more enjoyable.
