This KMC direct-mount chainring suits Bosch Gen 4 (G4) e-bike motor units and provides a versatile 38-tooth gear ratio for mixed-terrain riding. With an 11/128" pitch for e-bike chain compatibility and black anodised aluminium construction, it handles the torque demands of Bosch's Gen 4 motor system over extended service periods. A straightforward, quality chainring for Bosch G4 builds and service replacements.

  • Compatible with Bosch Gen 4 (G4) e-bike motor systems
  • Direct mount interface
  • 38T, 11/128" pitch
  • Black anodised aluminium construction
  • KMC quality, made for high-torque e-bike use
  • Versatile ratio for mixed-terrain riding

KMC chains are covered against manufacturing defects. If a chain fails from a defect in materials or workmanship, return it to Tune Cycles with your proof of purchase and we'll manage the claim with KMC on your behalf — no need to contact the distributor yourself. This is in addition to your rights under Australian Consumer Law, which apply regardless of any manufacturer's warranty.

  • 38 teeth, 11/128" (narrow) profile
  • Direct mount for Bosch Gen 4 mid-drive motors
  • Steel, black finish
Teeth38T
MotorBosch Gen 4
MountDirect mount
Profile11/128" (narrow)
SKU BPW-0478
Model # 0478
Brand KMC
Shipping Weight 0.3000kg
Shipping Width 0.160m
Shipping Height 0.060m
Shipping Length 0.220m