Shimano GRX FC-RX820-2 Crankset - 175mm, 12-Speed, 48/31t, 110/80 BCD, Hollowtech II, BlackThe Shimano FC RX820 crank balances weight savings, optimized efficiency and an array of gearing options that cater to the segmented demands of mixed terrain riding. Product Specifics Color: Black Rings: 48 31 Number of Chainrings: Double Crank Length (mm): 175 Crank Intended Use: Gravel Drivetrain Speeds: 12 Weight: 710 BB Included: No Pedal Spindle: 9 16" Spindle Interface Type: Shimano Hollowtech II Chainring BCD: 110 Shimano Asymmetric Today's