Thule 990XT Doubletrack is a lightweight platform hitch rack with an adjustable center mast design that applies pressure to the bike frame. It can transport two bikes regardless of frame design, suspension, or wheel size. Stinger Swinger hitch adaptor accommodates 2 inch and 1.25 inch receiver hitches Foldable center mast's ratchet hooks move independently to grab, hold and stabilize each bike quickly and easily Padded arms protect your bike's frame Reinforced wheel trays slide independently along platforms to eliminate bike-to-bike contact Ratcheting wheel strap quickly secures bike wheel to tray Hitch Switch quick release level for rapid fold-up storage when not in use Fits the widest range of bike sizes and shapes, even cruisers with fenders and tire widths of up to 3" Lock rack to vehicle with Thule STL2 hitch lock Lock bicycles to rack with 2 Thule One Key lock cylinders to secure bicycles to the carrier