If you own a 2019+ generation Cannondale road bike like the SuperSix EVO, SystemSix, CAAD13, or Topstone Carbon, the Original Cannondale Derailleur Hanger is a must-have. Designed specifically for these bike models, this double-lead version (also known as the Speed Release) ensures a proper fit and optimal performance. However, it’s important to note that you’ll need to make sure you have the correct axle threads, as the single-lead version (part number K33049) is not compatible. The kit comes with one derailleur hanger and mounting screw.