Abstract: An air deflector of the type having a central deflector surface with hingedly attached lateral wings is supported in deployed position against a frame by upright struts foldable on a pivoted end and engaged in socketed relation to the frame at the opposite end, the struts being urged to remain in socketed engagement by normal wind forces. The lateral wings are held in deployed position by arms also fastened in socketed relation to the frame, and latches on the frame have wind vanes thereon for preventing the latches from becoming disengaged under vibration. A strap provides added tension to hold the deflector in deployed position, or to retain the deflector with wings folded under the central deflector surface in folded position.