A reliable drivetrain for your Bosch-powered e-bike. The KMC BDU38/34 sprocket, with 34 teeth, has been specially designed for demanding Bosch drive units. It ensures smooth operation, a long service life and perfect chain guidance in single-chainring (1x) drivetrains.
Safe riding without the chain coming off, thanks to Narrow-Wide
The use of a refined Narrow-Wide tooth profile (alternating narrow and wide teeth) guarantees a stable chain grip even on rough terrain. This solution eliminates the need for additional chain guides, thereby removing the risk of the chain coming off during dynamic riding.
Maximum efficiency and battery life
The KMC sprocket works in perfect harmony with the chain, reducing rolling resistance and friction in the drivetrain. Lower energy losses translate directly into optimal utilisation of the motor’s power and greater battery range for your e-bike.
Specifications:
| Manufacturer | KMC |
| Intended use | Bosch Drive Unit BDU38 / BDU34 |
| Number of teeth | 34T |
| Mounting type | Direct Mount (DM) |
| Chainline | 55 mm |
| Chain size | 11/128″ |
| Tooth profile | Narrow-Wide |
| Front compatibility | Single-chainring drivetrains |
| Rear compatibility | 9, 10, 11, 12-speed |
| Recommended chains | KMC e-Series (e1, e8, e9, e10, e11, e12, eGlide), DLC12 |
| Colour | Black |
| Weight | 254 g |
