Wind Deflector will deflect as much weather away from the rider pocket as possible while still allowing the ability to bring air into the riding pocket at various angles for comfort, The 3-3/4* x 9-3/4* upper deflector panel mounts below the mirror with a custom pivot bracket allowing 125? of rotation and allowing the mirror to fully fold without interfering with the wind deflector, Easy to install with only 2 mounting holes per panel