Knowing what's behind you before you change lanes or pull out takes the guesswork out of city riding. The RideView Mirror mounts into your handlebar end and swivels to match your riding position, with an anti-glare surface that cuts down on harsh reflections from headlights and sun. It's shatter-resistant for everyday knocks and folds to a compact profile when not needed. Sold as a pair and compatible with any flat handlebar with an inner diameter of 17-21mm. *This accessory is a visibility aid, not a substitute for a shoulder check or defensive riding.