"The MTX3 hitch mounted carrier rack is made for transporting dirt bikes with MX motorcycle front tires up to 4.75"" wide, rear tires up to 6"" wide, and a maximum 500 lb. dirt bike weight. An adjustable 3"" high track fits dirt bikes with a 48"" to 65"" wheelbase and includes a detachable ramp for easy loading and unloading."