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, 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.

Features
3mm offset: For 53mm chainline on CX Gen4/SX and 55mm chainline on CX Gen5 bikes.
15mm offset: For 55mm chainline on CX Gen4/SX and 57mm chainline on CX Gen5 bikes.

Specifications
Chainline: Bosch® – 13mm offset for 53mm chainline on CX Gen4/SX and 55mm on CX Gen5; Bosch® – 15mm offset for 55mm chainline on CX Gen4/SX and 57mm on CX Gen5; Shimano® – 21.5mm offset for 55mm chainline; Specialized® Kenevo/Levo SL 1.1 – -4mm offset for 52mm chainline; Specialized® Turbo Levo 2.1/2.2 – 9mm offset for 52mm chainline; TQ® HPR50 – 12mm offset for 55mm chainline; Fazua® Ride 60 – 18mm offset for 55mm chainline; Avinox – 8mm offset for 55mm chainline
Compatibility: Bosch® Gen4/Gen5 CX, Bosch Performance Line SX, Shimano EP8, Specialized Turbo Levo 2.1/2.2 and Kenevo/Levo SL 1.1, TQ HPR50, Fazua Ride 60, Avinox
Features: Lightweight, stiff, long wear life with technical aesthetics and enhanced chain retention; cross-compatible with Shimano®, SRAM® and TRP® 11/12-speed drivetrains
Included: Bosch® rings only – integrated aluminum dust cover (rubber seal specific to Helix Race cranks not included)
Material: Forged-CNC 7075 Aluminum
Size: Bosch® – 32T, 34T, 36T (13mm offset only); Shimano® – 32T, 34T; Specialized® Kenevo/Levo SL 1.1 – 32T; Specialized® Turbo Levo 2.1/2.2 – 34T; TQ® HPR50 – 32T, 34T; Fazua® Ride 60 – 32T, 34T; Avinox – 34T, 36T

Mfr Claimed Weight
Bosch®:
13mm offset: 32T: 99g / 34T: 107g
15mm offset: 32T: 108g / 34T: 114g (without rubber dust seal)
Shimano® EP8:
32T: 115g / 34T: 120g
Specialized® Turbo Levo 2.1/2.2:
34T: 128g
Specialized® Kenevo/ Levo SL 1.1:
32T: 107g
TQ® HPR50:
32T: 95g / 34T: 102g
Fazua® Ride 60:
32T: 111g / 34T: 117g
Avinox:
34T: 102g / 36T: 109g