A steel direct mount chainring built for Bosch SX and Gen4 CX e-MTB motors, sized to handle motor torque without the noise or wear of an alloy ring. This part replaces the earlier ZCR4USA-101.

Highlights

  • 36T, for Bosch SX and Gen4 CX motors
  • 53mm or 55mm chainline (15.5mm / 13.5mm offset)
  • 4040 steel, cold-formed and heat-treated
  • M4 narrow-wide tooth profile for chain retention
  • Direct mount, black

Compatibility & fit

Fits e*thirteen's e*spec direct mount interface on Bosch SX and Gen4 CX e-MTB cranksets, with a choice of 53mm or 55mm chainline via the two offsets listed. Compatible with Shimano and SRAM 11/12-speed drivetrains. The Tune workshop can fit it as part of an eMTB drivetrain service.

e*thirteen's standard warranty covers this product for 10 years against manufacturing and material defects; normal wear, crash damage and misuse aren't covered, though e*thirteen's Infinite Ride programme offers a discounted replacement after a crash. 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, so keep your proof of purchase.
  • 36T, for Bosch SX and Gen4 CX motors
  • 4040 steel, heat-treated
  • 53mm / 55mm chainline (15.5mm / 13.5mm offset)
  • M4 narrow-wide tooth profile
  • Direct mount, black
Brande*thirteen
ModelHelix Core e*spec
Motor fitBosch SX, Bosch Gen4 CX
Teeth36T
Material4040 steel
Chainline53mm / 55mm
Offset15.5mm / 13.5mm
MountDirect mount
ColourBlack
Part numberCR5ESA-101 (replaces ZCR4USA-101)
SKU DTW-ETG-CR5ESA-101
Barcode # 4711280341344
Brand e*Thirteen