When considering a mirror, it is important that it matches the quality of the bike. A mirror that sticks out like an afterthought is not a proper instrument on a road bike. Mario, the patriarch of the family in Italy, developed this mirror with great care and thought. There are 3 things that make The Italian Road Bike Mirror different and the best mirror for a road bike. First is its very low and minimalist profile. Second is that there is no ball joint. It does not vibrate or get bumped out of position. Third is the specially designed instrument quality glass. The glass was carefully designed to get the best possible image from the smallest possible mirror. The surface of The Italian Road Bike Mirror is front-silvered (also known as a ?first-surface" mirror.) The glass has a vacuum deposited hard aluminum coating on the front, it is not ?silvered? on the back like a common mirror. This front-silvering eliminates ghost images which are seen in common rear surface silvered mirrors. A front-silvered mirror displays the most accurate reflected image. These instrument grade mirrors are found in high end telescopes, military periscopes, and of course now on The Italian Road Bike Mirror. The Italian Road Bike Mirror is adjusted and positioned during installation. Please do keep in mind that you will need to remove a portion or all of your bar tape to install this mirror. After installation, reinstall your bar tape or install new bar tape. Then the adjustment can be fined tuned. Once in position it stays in position. When properly installed, there is no need to re-adjust it over and over because of bumping it or because of the vibrations of the road. Detailed instructions are included in the mirror package. Buona Pedalata! (Happy Riding!) Marco