An aluminium direct-mount chainring built for Bosch CX Gen4 eBike motors, using e*thirteen's M3 narrow-wide tooth profile to keep the chain under motor torque.

Highlights

  • Direct mount to Bosch CX Gen4 drive units
  • 53mm chainline
  • M3 narrow-wide tooth profile cuts chain noise and wear
  • 7050 aluminium construction, lighter than the steel equivalent
  • Works with 11 and 12-speed drivetrains

Built for eBike torque

e*thirteen's e*spec chainrings are designed around eBike motor torque, with a wider, more durable tooth profile than a standard chainring to stand up to Bosch's CX Gen4 drive unit.

Compatibility & fit

Direct mount to Bosch CX Gen4 motors only, 53mm chainline, compatible with 11 and 12-speed drivetrains.

Options

TeethWhat differs
34TSmaller ring in this range
38TLarger ring in this range
e*thirteen covers this chainring for 10 years against manufacturing and material defects, with a discounted crash-replacement option available. For warranty support, return the product to Tune Cycles and we'll manage the claim with e*thirteen's Australian distributor. This is in addition to your rights under the Australian Consumer Law — keep your proof of purchase.
  • Direct mount, Bosch CX Gen4
  • 53mm chainline
  • M3 narrow-wide tooth profile
  • 7050 aluminium
  • 34T / 38T
MountDirect mount, Bosch CX Gen4
Chainline53mm
Material7050 aluminium
Tooth profileM3 narrow-wide
ColourBlack
Drivetrain11/12-speed
Teeth34T, 38T
SKU DTW-ETG-CRESPB43-PAR
Brand e*Thirteen