E*Thirteen Helix Race E*Spec Direct Mount Chainring

Helix R E Spec Chainrings merge cutting-edge design and performance. Designed as an upgrade for the most popular e-bike motor systems, this 1-piece direct mount chainring is forged and machined from 7075 AL. Boasting lightweight, durability, impressive stiffness, and a standout technical aesthetic, they're available for Bosch CX Gen4/Gen5, Bosch SX, TQ HPR50, Fazua Ride 60, Shimano EP8, DJI Avinox, as well as Specialized SL1.1 and 2.1/2.2 motors.

With a long-wearing tooth profile and refined aesthetic, the integrated look, when paired with Helix Race Alloy E Spec cranks, is the ultimate upgrade to your e-bike.

The new M4 narrow-wide profile delivers enhanced chain retention and cross-compatibility with Shimano, SRAM, and TRP 11/12s drivetrain, including SRAM T-Type. It's available in a variety of Specialized colors for coordination with E Thirteen cranks, cassettes, stems, tubeless valves, and more.

Specifications:

• Chainline:
  • Bosch: 13 mm offset for 53 mm chainline on CX Gen4/SX, and 55 mm chainline on CX Gen5
  • Bosch: 15 mm offset for 55 mm chainline on CX Gen4/SX, and 57 mm chainline on CX Gen5
  • Shimano: 21.5 mm offset for 55 mm chainline
  • Specialized Kenevo/Levo SL 1.1: -4 mm offset for 52 mm chainline
  • Specialized Turbo Levo 2.1/2.2: 9 mm offset for 52 mm chainline
  • Fazua Ride 60: 18 mm offset for 55 mm chainline
• Weight:
  • Bosch:
    • 13 mm offset:
      • 32T: 99 g
      • 34T: 107 g
    • 15 mm offset:
      • 32T: 108 g
      • 34T: 114 g (without rubber dust seal)
  • Shimano® EP8:
    • 32T: 115 g
    • 34T: 120 g
  • Specialized:
    • Kenevo/Levo SL 1.1 32T: 107 g
    • Turbo Levo 2.1/2.2 34T: 128 g
  • Fazua® Ride 60:
    • 32T: 111 g
    • 34T: 117 g