Built from light weight extruded structural aluminium Strong, Durable and ready to work The Rhino Heavy Duty Product Range is a diverse range of roof racks that come in several different Heavy Duty styles and fitments. Available with Black or Silver bars, the Heavy Duty range was specifically designed with the professional tradesman and avid 4 wheel driver in mind. The cross bars are extruded structural aluminium, so all heavy duty roof racks are Strong, Durable and ready to work. The Rhino Heavy Duty range can carry substantial loads and generally has a higher load rating than any other roof rack type.