The Race Face Aeffect crank is designed to handle aggressive trail riding at XC crank weight and an attractive pricepoint. Features the CINCH system with its interchangeable spider options and a 24mm EXI interface spindle.Direct mount chainline: 51mm / 57.5mm (Flipped Ring)2X Cinch spider chainline: 49.5mmBoost 2X Cinch spider chainline: 52.5mmCrank arms forged from 6066 aluminumCompatible with all CINCH direct mount rings and spiders to easily convert between existing chainring standards including: direct mount, 1x, 2x with and without bash, and 3x configurations24mm EXI spindle compatible with Race Face X-Type bottom brackets or Hollowtech II compatible bottom bracketsCINCH removable spiders and direct mount rings require a 20-tooth ISIS cup BB tool for removal and installationItem SpecificationsBB IncludedNoChainline/Hub Compatibility135/142 MTB HubsChainline/Hub Compatibility141/148 Boost HubsChainring BCDDirect Mount CINCHColorBlackCrank Intended UseMountainCrank Length (mm)165Defined ColorBlackDrivetrain Speeds10Drivetrain Speeds11Drivetrain Speeds12Drivetrain Speeds9keyword searchRXC137Number of ChainringsNo Rings, No Spider IncludedPedal Spindle9/16"RingsSold SeparatelySpindle Interface TypeRaceFace EXISpindle Interface TypeShimano Hollowtech II RaceFace Aeffect Crankset Crankset UPC: 821973340661