Thule 918XTR T2 2 Bike Add-On Hitch Rack (2-Inch) Allows for up to 4 bikes with the 916XTR T2 carrier (sold separately, 2" receiver only) SecureHook support arms hold bikes by grabbing their front wheels  no frame contact is made Fits 20-29 inch wheel diameter bicycles supporting tires up to 3-inches wide Hitch Switch lever folds and stores platform when not in use or tilts platform down for rear of vehicle access, even when loaded Reinforced tray provides maximum strength and rust-free protection DO NOT install on a trailer or other towed vehicle