Same great features of the Super Wing, mounting specifically to Selle SMP seat rails; Get a perfect position for you with 3 carrier positions and 4 cage angle positions; Tuck your repair out of the wind, in the integrated storage compartment for free speed; Mount 2 bottles on the side or 1 at the rear for flexibility. No need to purchase multiple carriers; Sturdy aerospace aluminum material makes the Super Wing the toughest carrier on the market