Please use the Cannondale Gear Hanger Identification chart to help identify the correct gear hanger for your bicycle.Genuine Cannondale part.Note for Di2 use KP396/Fits:2017-19 Cannondale S6 EVO Crb2017-19 Cannondale S6 EVO Crb Disc2017-19 Cannondale S6 EVO HM2017-19 Cannondale S6 EVO HM Disc