2 Pack Bicycle Mirror for Handlebars – Adjustable Bike Mirror Handlebar Mount, Wide Field of View for Safe Cycling, Easy Installation, Vibration-Free (Black-round)

These mirrors were to replace the ones I purchased a couple of years ago. Unfortunately those older mirrors were rather cheaply made and deteriorated quickly after a few months of exposure to the outdoor elements. These mirrors seem like a step or two up in quality and design. And they are quite a bit larger than my old mirrors.One thing that these new mirrors have in common with my old mirrors is that the mirrors themselves seem to be of a composite plastic construction. I was hoping that they might be of a harden glass, which would weather better and provide a clearer reflective image. On closer inspection, the quality of construction and the mirror elements both seem to be much better than the old mirrors. I’m hoping that the improved materials and better construction yield superior clarity and visibility, while proving to be more durable against the elements. After a couple of weeks of riding I can definitely say that the reflective imaging is superior and that field of view is much, much better.The design of the mirrors and sturdiness of the mounts are quite good. I planned to only use one mirror for the left side viewing position. Because my cross-over (mountain) bike’s handlebar real estate is limited, due to the placement of the shifters, brake levers, and on the left side, my cycling computer, I located the mirror mount about three inches to the left of the stem. This seemed like a good location to minimize vibrations and offer reasonable flexibility in positioning the mirror to provide good viewing angles for seeing approaching traffic from behind. (The further a component is placed and attached to the handlebars from the stem and bike centerline, the greater the amplification of vibrations generated from the road.)I was impressed with how many adjustments could be made to the mirror and mount. The mount itself is rigid and yet flexible. Though I initially thought to bend the mount at a “right angle” and extend it directly out to the handle grip, I decided to use a curved configuration with a single moderate bend. My reasoning was that a curved configuration would provide some modest additional dampening for any vibrations that traveled up from the road, through the frame, handlebars, and mount, onto the mirror.Some “final adjustments” to the mount configuration and the mirror orientation were made on the road while riding. A few additional stops were made for some tweaking of the mirror alignment. It was important to insure that cars approaching from the rear were seen earlier rather than later. Through these riding sessions I never felt the need to have a right side mirror in place. The images presented in the left side mirror were very clear with a good field of view.In the end, despite the placement of the mount as near as possible to the bike centerline, the curved orientation of the mount, and the stiff but flexible shaft design, the mirror was subject to some substantial vibrations. On very smooth streets and thoroughfares this wasn’t a problem. But as the roughness of the pavement increased, so did the vibration, and subsequently the rear view visibility.These mirrors are big enough to be mounted and functional on mopeds, scooters, and light motorcycles. They are probably close to the maximum useful size that you would want for a bicycle. As such, they do somewhat, dominate the image of the bicycle. Overall, I think that an appropriate rating would be a little north of 4 stars.