Race Face Bosch G4 Direct Mount Hyperglide+ eMTB Chainring (52mm Chainline) - 36t, Steel, Requires Compatible with Shimano 12-speed HG+ Chain, BlackThe 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. Only compatible with Hyperglide + chains and Bosch Gen 4 Performance Line CX motor Designed for use with 12 speed Compatible with Shimano drivetrains Narrow Wide tooth profiling ensures consistent chain retention Steel Product Specifics Bosch Drive Unit Compatibility: Performance