e*thirteen Helix Guidering - 30t 10/11/12-Speed 52/55mm Flip Flop CL 3/5mm Offset e*thirteen DM BLK

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(TM) and SRAM(TM) 12 speed drivetrains.e*thirteen's Gen 4 narrow-wide tooth profile delivers upgraded chain retention lower system noise and increased wear-lifeCross-Compatible with SRAM and Shimano 11 and 12 speed chainsConvenient flip-flop design compatible with both Boost and SuperBoost chainlines (52/55mm)