BFCB20138 - KMC 38T Bosch E-Bike Gen 3 chainring with direct mount, 3 mm offset and 50.5 mm chainline. CrMo, compatible with 1x11, 1x10, 1x9-speed and singlespeed. - 8719189051780

BCRBNW34T001 - KMC Bosch BDU 38/34 chainring: 34T steel Direct Mount, 55 mm chainline, for 1x 1/8/9/10/11/12-speed systems. - 8720828042755

BCRB3RL15042S - KMC Bosch E-Bike Gen 3 chainring, 42T steel Direct Mount, for 1 x 1/8/9/10/11/12 speed, 50/52 mm chainline. - 8721398630267

BCRB4RL15242S3 - KMC Bosch E-Bike Gen 4 chainring, 42T steel Direct Mount, 52 mm chainline, for 1x 1/8/9/10/11/12-speed systems. - 8721398630113

BCRB4RL14742S - KMC chainring for Bosch E-Bike Gen 4, 42T, Direct Mount, 47.5 mm chainline, steel, for 1x 1/8/9/10/11/12-speed drivetrains. - 8721398630106

BCRB4RL15038S3 - KMC Bosch E-Bike Gen 4 Super Narrow chainring, 38T, Direct Mount, 7.0 mm offset, chainline 50.0 mm, spacerless. - 8720828042366

BCRSNW38T001 - KMC Shimano STEPS EP chainring, 38T, Direct Mount, 47.5 mm chainline, steel. Compatible with 1x 8/9/10/11/12-speed drivetrains. - 8720828042830

BCRSNW34T001 - KMC Chainring for Shimano STEPS EP, 34T steel Direct Mount, 1 x 1/8/9/10/11/12 speed, 55 mm chainline. - 8720828042823