Thule DoubleTrack Pro XT Hitch Bike Rack - 1.25"/2" Receiver 2-Bike BlackFoldable center masts ratchet hooks move independently to grab, hold and stabilize each bike quickly and easily Hitch Switch lever folds and stores platform when not in use Adjustable wheel strap quickly secures back wheel to tray Fits 16 inch to 29 inch wheel diameter bicycles with up to 5 inch wide tires Accommodates bicycles with disc brakes, thru axles and other non traditional frame designs Hitch adapter included to accommodate 1 inch or 2 inch