TruVativ HammerSchmidt Cranksets combine all the benefits of a single-ring crank, a double-ring crank and a chain guide. Available in All Mountain and Freeride.Compatible with HammerSchmidt X.0 or X.9 front shifter (LD2100 or LD2101) or SRAM 2x10 front shifterCompatible with 1/8", 7-8-9- or 10-speed chainsCombines all the benefits of a single-ring crank, a double-ring crank and a chain guideSun and planetary gear system inside the spider provides 1.6:1 overdrive ratio for the approximate equivalent of 22/36-tooth or 24/38-tooth gearingShift instantly while pedaling under load, while stopped or while coastingCan only be installed on a frame with ISCG-03 or -05 tabsChainguide tabs and BB shell must be faced and be flush with each otherComes with 22- and 24-tooth chainringsArms are forged AL-7050, freeride model has more material for increased impact resistanceItem SpecificationsColorGrayWeight1309gSpindle Interface TypeTruVativ HammerSchmidtPedal Spindle9/16"Arm Length170mmRings22, 24Crank-FD TypeSingle RingFD/Shifter CompatibilityHammerSchmidtCrank Intended UseDH/FreerideChain Compatibility9-Speed,Shim/SRAM 10Chainguide Mount TypeISCG-05Defined ColorSilver