Cannondale made a running change in their KIDS TRAIL 24 bike production with early runs using a unique hanger (Cannondale part # KP316), which has different hole spacing than our DROPOUT-269. Measure the distance between the the hanger mounting holes. DROPOUT-269 mounting holes are 28mm apart center-to-center. Cannondale KP316 is 24mm. Later runs of KIDS TRAIL 24 frames will use DROPOUT-269.