Box Dimensions: Width = 3 feet, x Length = 13.1/2 feet, x Depth = 11 inches. Structure: Strong mild steel angle frame (1.3/4 ” x 1.3/4″), Reinforced braces. Road Tyre Size: 155 x 12 (in good condition). Spare tyre position: Under-slung below the trailer box. Overhead loads: Support brackets on the front and rear to accommodate posts for overhead carriage. Light Board: Wired for standard vehicle plug.