A vehicular mirror system comprises a base frame attached to a motor vehicle and a support frame supporting a reflective element assembly and pivotally attached to the base frame for pivoting the reflective element assembly between a folded position and an unfolded position. A detent assembly intercommunicating the support frame and the base frame comprises a plurality of spaced bosses and recesses positioned at different radii and enabling pivoting of the support frame with minimal vertical displacement of the support frame relative to the base frame.