>>149361155They're there to look cool. Fender mirrors are horrible at their jobs due to the inverse square law. A mirror three times further from you has 1/9th the perceived viewable area. A pillar mounted side mirror that is 11.5"x8.5" has a viewable area of 97.75 square inches, but if it's located three times further away on the fender that viewable area is functionally 10.75 square inches