Abstract: A universal, adaptable hanger mounted cargo carrier for removable mounting over and around a trailer frame without requiring modification of either I-beam or box beam trailer rails. The carrier comprises a generally rectangular box with steel mesh floor and opposed inverted corner J-hook mounts for slidable mounting of the carrier over the trailer frame rail extending deep enough below the bottom of the rail to enable a locking mechanism to at least partially close the opening of the inverted J-hook below the frame. Inverted “U” shaped spacers reduce the size of the J-hook opening, thereby adapting the carrier for flush mounting on a range of different sized rails. A steel mesh floor and holes in the walls of the carrier for insertion of hook ends of bungee cords allow for retention and transport of objects of varying size and shape.