Review on 🚴 Bike Mirror - HOPENE Handlebar Rearview Mirror for E-bike & Mountain Bike - Easy Installation, 360° Rotating, Adjustable HD Convex Mirror with Wide Field of View - Pack of 2 by Yung Rich

Mirrors are easy to fit out of the box, Allen keys are included. Make sure the handlebar end is between 18mm and 22mm. The diameter of the mirror is larger than a soda can. The mirror gives a very good clear picture. I recommend using some type of thread lock on the mounting screw and the screw on the side where the mirror attaches. Tightening the side screw should prevent the mirror from vibrating. UPDATE: After 8 weeks and about 700 miles of driving, the mirror has held up very well. If I ever need a mirror again, I will buy it again.