Shimano, GRX FC-RX810-1, Crankset, Speed: 11, Spindle: 24mm, BCD: 110, 40, Hollowtech II, 172.5mm, Black, Road Disc

* GRX 11 speed, hollow arm 1X crankset* Narrow-wide 40T chainring* Balances weight and efficiency for mixed-terrain riding* Gravel specific gearing ratios with 1X simplicity and wide-range gearing* Bottom Bracket : Not included - SM-BBR60 / SM-BB72* Chainline: 50.1mm* Weight : 644g