Helix e*thirteen Direct Mount Guidering

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Helix Direct Mount rings are designed for use with e*thirteen Helix, TRS, LG1 and XCX Direct Mount cranks. These rings are compatible with both Shimano™ and SRAM™ 12 speed drivetra ins. e*thirteen's Gen 4 narrow-wide tooth profile delivers upgraded chain retention, lower system noise, and increased wear-life Cross-Compatible with SRAM and Shimano 11 and 12 speed chains Convenient flip-flop design, compatible with both Boost and SuperBoost chainlines (52/55mm) Show more