The placement of mounting depends a lot on the process of installing the mirror. Let’s talk about handlebar mounting here. You need to unscrew the end of the handlebar as a first step. Then, insert the mirror and screw it back. These three steps are as simple as they sound. The only tool you need here is a screwdriver. More or less the same steps are required to mount a bicycle mirror in other locations like helmets or glasses. Instead of a screw, you can also mount them with Velcro or adhesive.