Fits: - Catalyst - 2016 - Forray - 2016 - Kids Trail 24 - 2013 - 2015 - RUSH 29ER - 2014 - 2015 - Trail 27.5 - 2016 - TRAIL SL - 2013 - 2015 Measure the distance between the the hanger mounting holes. Derailleur Hanger -269.mounting holes are 28mm apart center-to-center. Cannondale KP316 is 24mm. Later runs of KIDS TRAIL 24 frames will use Derailleur Hanger -269.