Review on 🚴 360° Rotation Rearview Bicycle Mirrors for Mountain, Off-Road, and Fixed Gear Bikes (1.8 cm - 2 cm Handlebar Diameter) by Madansaireddy Aldridge

These mirrors are not suitable for mountain bikes and cross bikes. Suitable for road handlebars. Your arms aren't long enough to reach the end of the handlebars where they're needed to see what's behind you. The clip barely fits on a bare handlebar without tape. It uses a nut and bolt to tighten it, it must have a wing nut or be otherwise adjustable without tools. The nut is positioned to be upside down and difficult to install without interfering with the brake or shift lever.