Leisesturm, I finally agree with you, although I do not use a mirror. I see riders with bar end mirrors who are clueless as to what is happening behind them-they usually have to bend to actually see anything. A good part of my commute is along a four lane road with no berm-mirror of no help. About the only thing it would help with is giving me comfort that a car approaching me from behind has moved out to the passing lane-now I clench slightly until they are in my field of view. My attention is always on the road ahead of me, to hopefully minimize the impact of surprise potholes and debris, I turn around before making lane changes.