Helix Race 8-Bolt Chainrings are an upgrade to any 8-bolt drivetrain. Exquisitely machined from 7075-AL, they're stiff and durable, and provide a significant weight reduction over competitors. A unique four-bolt locking interface reduces assembly weight while improving longevity and ease of assembly and maintenance. Featuring e*thirteen's M4 narrow-wide tooth profile, they deliver excellent chain retention, long wear-life, and cross-compatibility with Shimano® and Sram®  drivetrains, including T-type™.

• M4 narrow-wide profile delivers enhanced chain retention and cross compatibility with Shimano®, Sram®, and TRP® 11/12s drivetrains, incl. T-Type™
• Unique 4-bolt locking interface reduces weight and simplifies installation and maintenance
• Forged-CNC 7075 AL for ultralight weight, with high strength, stiffness, and wear-life
• Compatible with 8-bolt cranks and e*thirteen Helix Race Carbon Cranks
• 30/32/34T sizes complement e*thirteen wide range cassettes