This is a derailleur hanger for the following Cannondale bikes: 2016-2018 CAAD 12 2016-2018 CAAD 12 Disc 2017-2018 CAAD OPTIMO 2017-2018 CAAD OPTIMO Disc 2017-2018 CAADX 2018 Synapse Alloy Disc 2017 Synapse Alloy 2017-2018 Bad Boy 2016 CAAD 8 2015-2017 Slice Multsport 2018 Tesoro
