Mirrors in traffic contribute to road safety. The traffic behind you can be tracked without big head movements. For this reason, rear-view mirrors have not only been established on cars, but also on motorcycles or trucks. You can use the usual benefits on the handlebar or on the helmet as well. However, not only does a rear view mirror contribute to your own safety positively but also to the safety of the participants on a collective bike ride. On a multi-participant bike ride, you can quickly and easily see if the group is still together or tearing apart. The mounting of the mirror is uncomplicated. Those are mounted with a clamp on the handlebar or with a plug in the handlebar tube.