e*thirteen Helix R Chainring 11/12-Speed Direct Mount

The e*Thirteen Helix R Direct Mount Chainrings are manufactured from durable AL-7075-T6 aluminum, combining aesthetics with design efficiency. Their flip-flop design accommodates both Boost and Super Boost chainlines, providing versatility for different frame specifications. These chainrings feature e*Thirteen's narrow-wide tooth profile (M4) which ensures enhanced chain retention, reduced wear, and compatibility with both Shimano and SRAM 11/12-speed chains. The Direct Mount design works with Helix cranks and is backward compatible with e*Thirteen TRS LG1 and XCX Race cranks. e*Thirteen's Quick Connect direct mount interface keeps the system secure and creak-free. The chainrings are forged from premium 7075-T6 aluminum and extensively CNC optimized for light weight and technical aesthetics, delivering durability, stiffness, and strength for long wear-life.