XC 2 Bike Rail Rac. 2 Inch Receiver Hitch The Cross Country "XC" 2-Bike Rail Rack can easily accommodate children's and adult bikes, downhill bikes, cruiser bikes, full suspension bikes, BMX bikes, "Y" frame designs and much more, without the hassle of removing wheels. The XC slides into a 2" receiver and carries up to 2 bikes, with an option to carry up to 4 bikes with another module (4 bikes on Class III hitch only). The XC easily adjusts to different bike frame sizes with the simple movement of the wheel hoops. Frame grip arms have a soft-frame friendly coating to protect your bike's finish. When not in use, the rack folds up for easy storage (on or off vehicle), shipping, etc. The XC carries the widest variety of bike frames in its class.