FSA Carbon Track crankset, ISISx170mm* BB Shell Width: ISISChain Compatibility: 1/2" x 1/8"Chainring BCD: 144mmChainrings: 49TCrank Color: CarbonCrank/FD Type: Single RingCrankarm Length: 170mmCrankarm Length: 170mmCrankset BCD: 144mmCrnk Clr: CarbonInterface: ISISLength: 170mmPedal Spindle: 9/16"Rings: 49tSpeed: 1x1Spin: Not ApplicableSpindle Interface Type: ISISSpindle Length: 108mmWeight: 809g