Shimano GRX FC-RX820-2 Crankset - 170mm, 12-Speed, 48/31t, 110/80 BCD, Hollowtech II, Black

The 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. Gravel-optimized 48-31t gear combination ratios preserve riding rhythm on rough surfaces The 17t range covers an array of riding conditions Smaller gear steps for cadence control on mixed-terrain riding Hollowtech II crank arms provide strength and stiffness with the benefit of weight savings Compatible with HG 12-speed chains 47mm chainline SPECIFICATIONS Number of Chainrings: Double Color: Black Chainline/Hub Compatibility: 135/142 Road Disc Hubs > 415 mm Chainstay Pedal Spindle: 9/16" Crank Intended Use: Gravel Crank Length (mm): 170 Rings: 48/31 Spindle Interface Type: Shimano Hollowtech II Drivetrain Speeds: 12 Defined Color: Black Chainring BCD: 110 Shimano Asymmetric , 80 BB Included: No Weight: 710