Trailer tow mirror

The mirror assembly has a pair of telescoping tubular supports (14, 16) extending between a support base (10) and a mirror head (B) to provide adjustment of the mirror head (B) toward and away from the support base (10). Friction shoes (D) within the tubular supports (14, 16) releasably hold such supports against unintentional telescoping movement. Cooperating stops (14a, 14b, 16a, 16b) on the telescoping supports (14, 16) limit outward movement of the mirror head (B) and prevent complete separation of the telescoping supports (14, 16). The tubular supports (14, 16) are hingedly attached to the support base (10) for rotation about a vertical axis (28) and cooperating detents (160, 170) and spring elements (140, 142) on the supports (14, 16) and support base (10) releasably hold the supports (14, 16) against rotation.