The Rhino Rack RVP Roof Rack part # RR77QJ that you referenced is compatible with all aftermarket roof racks and cargo boxes such as the Thule Force XT L part # TH6357B which can carry up to 16 cubic feet of gear. The Rhino Rack crossbars are standard in shape and size so all boxes are going to fit. It also has channels on top of the bars for attaching to accessories as well. view full answer...