The e*thirteen Helix Race 3-Bolt Direct Mount Chainrings, engineered for SRAM 3-Bolt crank systems, merge aesthetics with robust durability. e*thirteen's narrow-wide tooth profile ensures compatibility with Shimano and SRAM 11 and 12-speed drivetrains. Manufactured from AL-7075-T6 aerospace-grade aluminum, the rings are CNC sculpted to provide low weights. Elevate your 3-Bolt Cranks, diversify drivetrains, reduce weight, and bring a new aesthetic to your bike with the Helix R 3-Bolt Chainrings.3mm Offset, 3-Bolt Direct Mount design for use with SRAM 3-bolt direct mount compatible cranksM4 narrow-wide tooth profile provides Shimano and SRAM 11/12-speed chain compatibility, excellent chain retention, and reduced wearForged from premium 7075- T7 aluminum, then extensively CNC optimized for industry leading weights, and a unique high-end full CNC aestheticDurable 7075-T6 construction for long wear-life, stiffness, and strengthItem SpecificationsColorBlackDefined ColorBlackDirect Mount TypeDirect Mount SRAM 3-BoltDrivetrain Speeds11Drivetrain Speeds12MaterialAluminumOffset3Round or OvalRoundTooth Count32Weight46 e*thirteen Helix Race SRAM 3-Bolt Direct Mount Chainring Direct Mount Chainrings EAN: 4711280340958