Free Sample
The Complete Handbook of Bicycle Mirrors
Essential Knowledge for Cyclists, Retailers, Mechanics, and Resellers
by Alumigogo Books
Chapter 1: Understanding Bicycle Mirrors
What Mirrors Do
A bicycle mirror is a reflective optical device mounted to a bike or helmet that allows the rider to see behind themselves without turning their head. That simple statement hides a significant amount of complexity. In practice, a mirror is a solution to a specific safety and situational-awareness problem: human peripheral vision and head-turning have limits. When you ride in traffic, particularly in urban or multi-directional environments, you need to know what is behind you without breaking eye contact with the road ahead or physically rotating to look. A mirror solves that problem—partially, conditionally, and only if it is installed correctly and understood by the rider.
The mirror does not replace head turns. This is the first critical misunderstanding. A well-positioned bicycle mirror extends your awareness, but it cannot replace a quick glance over your shoulder or a full head turn. The mirror shows you a portion of what is behind you, constrained by its optical design, mounting position, and the angle at which it is aimed. A rider who relies solely on a mirror without also turning their head is operating with incomplete information about traffic around them. A mirror is an addition to your awareness, not a replacement for it.
Second, a mirror shows you what is directly behind and to the side of your bike, not everything. The field of view of a typical bicycle mirror is 40 to 60 degrees at best, depending on the mirror type. This