The Thule Arcos platform is required to successfully install your Thule Arcos rear cargo carrier The tool-free and lockable AutoAttach system, with lockable AcuTight lever (lock included), allows for quick and secure mounting and removal of the rack Patented outboard release handle provides easy hand-activated tilting for rear cargo access with or without bikes. Quickly tilts up to stow vertically when not in use, reducing the rear footprint Folds up vertically when not in use, reducing the rear footprint