E*thirteen Helix Core e*spec Direct Mount Chainring for Bosch CX4 - Black

Regular price £29.95
Tax included.


Helix Core e*spec | Chainring | 34T | Bosch SX / Gen4 CX Direct Mount | 53/55mm Chainline | 15.5mm / 13.5mm Offset | Black

Helix Core e*spec Direct Mount Chainrings feature our M3 narrow-wide tooth profile, for reliable chain retention and extra long wear life. Designed with an adjustable 13.5-15.5mm offset via spacer, they provide adaptability to both 53 and 55mm chainlines for Bosch CX motor systems. Helix Core e*spec rings are cold-formed from steel then heat-treated to provide excellent durability and toughness, all at a price that's easy on your wallet.


  • Long-lasting and economical steel chainring for Bosch CX Gen 4 motors
  • Narrow-Wide chain retention tooth profile
  • Adjustable chainline for 53 and 55mm CL bikes
  • Compatible with Shimano and most SRAM 11 and 12-speed chains
  • Durable and affordable steel e*spec chainrings for Bosch CX Gen 4 users, with adjustable chainline.


Size 34T
Compatability(Crank/Motor) Bosch CX Gen4
Chain line 53/55mm
Offset 15.5 / 13.5mm Offset
Speeds 11/12s
Chain Retention M4 narrow-wide
Chain Compatibility Shimano/SRAM 11/12s
Material 4040 Steel
Weight 183g
Color Black
Warranty 5 Years



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