e*thirteen Helix Guidering - 30t, 10/11/12-Speed, 52/55mm Flip Flop CL, 3/5mm Offset, e*thirteen DM, Black Shifter Service Parts 4mm depth) double wall Trail

4mm depth) double wall Trail rim

and 6mm hex bits

Manufacturer Part Number: BR21-00TX131R-SL

Manufacturer Part Number: BBUNIV-SHIM

170668-Q0-L

e*thirteen Helix Guidering - 30t, 10/11/12-Speed, 52/55mm Flip Flop CL, 3/5mm Offset, e*thirteen DM, Black Shifter Service Parts 4mm depth) double wall TrailHelix 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 drivetrains. 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