e*thirteen Helix Race Chainring

Helix Race 8-Bolt Chainring - 30T, Black

Helix Race 8 Bolt Chainrings are an update 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