Safety

The Mirrycle mounts in minutes with the wrench that is included. The mirror is a 3" round, convex glass mirror with a wide field of view. The mirror is adjustable to any viewing angle. - Fits inside handlebars with 13.75mm – 22.5mm (.54" to .875") inside diameter

Dimension Mini Bells take up less room on handlebars and fit 40mm or narrower. Check out the video for a YouTube sound clip!