Swagman bike carriers are very popular, they are strong, durable and versatile. Carry your bikes with you on this rugged black powder-coated, heavy-duty tubular steel bike carrier. Bikes load and unload easily! This bike carrier mounts to any 4" to 4.5" continuous welded steel square RV bumpers. This rack is easy to attach and easy to use. When you are not carrying bikes, use it to carry extra gear.