The Helix R is e*thirteen's top-of-the-line aluminum alloy crank. Forged AL-6066-T6 arms deliver Enduro strength in XC weights and it took a 30mm Forged 7050-T7 spindle and massive amounts of CNC work to get there. CNC detail can be seen all over every surface for the ultimate in tech bling and weight savings for your ride. Designed to be compatible with Shimano and SRAM drivetrains, modern hub spacing, and bottom brackets. Helix R cranks can achieve boost and super boost chainlines with their flip-flop chainrings (Sold Separately).Forged 6066-T6 aluminum crank arms with CNC machining provides strength with lighter weight for improved acceleration and climbingSelf-extracting bolt system allows for easy installation and removal of crank armsForged and CNC machined 7050-T7 aluminum 30mm spindle is extra strong to provide years of trust and confidenceCompatible with SRAM and Shimano 12-Speed Narrow/Wide drivetrainsShimano BB92 and BB30 compatibilityCrankset includes: APS Adjuster, BB/Lockring Tool, Crank Boots (x2), User ManualBottom bracket and chainring sold separatelyItem SpecificationsBB IncludedNoChainline/Hub Compatibility135/142 MTB HubsChainline/Hub Compatibility141/148 Boost HubsChainline/Hub Compatibility157 Super Boost HubsChainring BCDDirect Mount e*ThirteenColorBlackCrank Intended UseMountainCrank Length (mm)175Number of ChainringsNo Rings, No Spider IncludedPedal Spindle9/16"RingsSold SeparatelySpindle Interface Typee*Thirteen P3 ConnectWeight545 e*thirteen Helix R Crankset Crankset EAN: 4711280340224