ethirteen Helix Race e*spec Chainring

ethirteen Helix Race e*spec Chainring Info

e*thirteen Helix Race e*spec Chainring is a premium e-MTB drivetrain upgrade engineered for high-torque motor systems and modern 1x drivetrains. Forged and machined from 7075 aluminum, this one-piece direct mount chainring delivers the stiffness, durability, and refined integration demanded by today’s performance e-bikes.

Built around e*thirteen’s updated M4 narrow-wide tooth profile, the Helix Race e*spec Chainring provides excellent chain retention while reducing noise and drivetrain wear under sustained motor load. The profile is cross-compatible with Shimano®, SRAM®, and TRP® 11- and 12-speed systems, including SRAM® T-Type®, making it a versatile option across a wide range of e-MTB builds.

Compatibility spans many of the most popular e-bike motor platforms, including Bosch CX Gen4 and Gen5, Bosch SX, TQ HPR50, Fazua Ride 60, Shimano EP8, Avinox, and Specialized SL 1.1 and 2.1/2.2 systems. Bosch-specific versions are offered with multiple offset options to achieve correct chainline across different generations. A variety of color options allows clean visual coordination with e*thirteen e*spec cranks and other drivetrain components for a fully integrated look.

e*thirteen Helix Race e*spec Chainring Specs at a Glance

• Mount Type: Direct mount, one-piece design.
• Material: Forged and CNC-machined 7075 aluminum.
• Tooth Profile: M4 narrow-wide.
• Drivetrain Compatibility: Shimano®, SRAM®, and TRP® 11/12-speed, including SRAM® T-Type®.
• Motor Compatibility: Bosch CX Gen4/Gen5, Bosch SX, TQ HPR50, Fazua Ride 60, Shimano EP8, Avinox, Specialized SL 1.1 and 2.1/2.2.
• Bosch Offsets: 13mm (53mm chainline CX Gen4/SX, 55mm CX Gen5); 15mm (55mm CX Gen4/SX, 57mm CX Gen5).
• Finish: Multiple color options for drivetrain coordination.

Design Benefits

1. E-MTB Ready Strength: 7075 alloy construction handles high torque and sustained loads.
2. Secure Chain Control: M4 narrow-wide profile improves retention and reduces noise.
3. Integrated Fit: Direct mount design delivers clean aesthetics and precise chainline options.

Final Take

The e*thirteen Helix Race e*spec Chainring is a high-performance solution for riders who want reliable chain control, broad motor compatibility, and a clean, integrated look on their e-MTB. With refined tooth profiling, durable construction, and precise offset options, it’s a smart upgrade for modern electric trail and enduro bikes.