Camcos Recessed Motorcycle Wheel Chock helps keep your motorcycle secured upright during transit and is designed for trailers with 16-inch cross member spacing. It accommodates most tire sizes with widths of up to 6. 25-inches and is constructed of durable, powder-coated steel. Includes all mounting hardware. Measures 17. 5-inches x 9. 75-inches x 2-inches deep. Must be used with straps (not included).