The RaceFace Aeffect R crankset offers enduro-rated strength in a lightweight XC-style package, making it a solid and dependable crankset choice.Direct mount chainline: 51mm / 57.5mm (Flipped Ring)2X Cinch spider chainline: 49.5mmBoost 2X Cinch spider chainline: 52.5mmIts forged 7050 AL construction optimizes stiffness without added weightThe Aeffect R features the versatile CINCH system for plenty of interchangeable spider optionsCan run alloy or steel CINCH direct mount chainringsBoost compatible 24mm EXI interface spindleItem SpecificationsBB IncludedNoChainline/Hub Compatibility135/142 MTB HubsChainline/Hub Compatibility141/148 Boost HubsChainring BCDDirect Mount CINCHColorStealthCrank Intended UseMountainCrank Length (mm)170Defined ColorBlackkeyword searchRXC137Number of ChainringsNo Rings, No Spider IncludedPedal Spindle9/16"RingsSold SeparatelySpindle Interface TypeRaceFace EXI RaceFace Aeffect R Crankset Crankset UPC: 821973354323