The RaceFace Bosch Gen4 Hyperglide+ steel chainring mounts directly to Bosch Gen 4 Performance Line CX E-bike motors, offering a minimalist look and long-wearing performance.For 55mm chainlineOnly compatible with Hyperglide + chains and Bosch Gen 4 Performance Line CX motor Designed for use with 12-speed Shimano drivetrainsNarrow Wide tooth profiling ensures consistent chain retentionSteelItem SpecificationsChainring BCDDirect Mount BoschColorBlackDefined ColorBlackDesigned for ebikeYesDirect Mount TypeDirect Mount Bosch Gen 4Drivetrain Speeds12Ring Position/TypeSingleTooth Count34 RaceFace Bosch Gen 4 eBike Direct Mount Hyperglide+ Chainring eBike Chainrings and Sprockets UPC: 821973409306