Abstract: An extension device to extend an original equipment vehicle side rear view mirror away from the vehicle so that the mirror may be used with wide loads. One end of a U-shaped extension device is inserted in the original mirror mounting bracket on the vehicle and the original mirror support arm is inserted in a sleeve that is rigidly secured to the other end of the extension device. Threaded fasteners, which are accessible to the driver through the vehicle window, extend through the sleeve to lock the mirror in adjusted position.