Cannondale Evo SystemSix CAAD13 2019+ Rear Derailleur Hanger Double Lead K33009The Cannondale Evo SystemSix CAAD13 2019+ Rear Derailleur Hanger Double Lead K33009 is an Original Cannondale derailleur hanger for many 2019+ generation road bikes including SuperSix EVO, SystemSix, CAAD13, and Topstone Carbon. This is the Double lead version, also know as Speed Release. Make sure you have the correct axle threads. Single lead version is part number K33049. Kit includes one derailleur hanger and mounting screw. Please call Cannondale for all compatibility questions.884603728291