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.Helix Race 8 Bolt Chainrings provide an weight-saving upgrade solution for 8-bolt crank users, and the perfect match for Helix Race Carbon CranksM4 narrow-wide profile delivers enhanced chain retention and cross compatibility with Shimano, SRAM, and TRP 11/12s drivetrains, incl. T-TypeUnique 4-bolt locking interface reduces weight and simplifies installation and maintenanceForged-CNC 7075 AL for ultralight weight, with high strength, stiffness, and wear-lifeCompatible with 8-bolt cranks and e*thirteen Helix Race Carbon CranksItem SpecificationsColorBlackDefined ColorBlackDirect Mount TypeDirect Mount SRAM 8-BoltDrivetrain Speeds11Drivetrain Speeds12MaterialAluminumOffset3Round or OvalRoundTooth Count30Weight46 e*thirteen Helix Race 8-Bolt Chainring Direct Mount Chainrings EAN: 4711280345403