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

The Mirrycle Road Mirror was developed exclusively to fit Shimano STI shifter/brake levers without interfering in any way. The Road Mirror fits almost all the different shift/brake combos. It goes on quickly and easily with the included tools. Just a flick of your eyes allows for a quick view behind. And, it can be attached to either the left or right side lever. Let's be careful out there.