Original Cannondale derailleur hanger for select Trail 24 kids bikes.
The first 3000 or so of the Kids 24" bikes used this unique derailleur hanger. Cannondale changed and standardized productionto use the KP284/ derailleur hanger. If your Trail 24" bike needs a derailleur hanger, measure the distance between the the hanger mounting holes. This KP316/ is 24mm. If it is larger then you will need the KP284 hanger.