Shimano GRX FC RX610 1 Crankset 170mm 12 Speed 40t 110 BCD Hollowtech II Spindle Interface BLK MFPN=191 40026 A005 Color Black Weight 43 Thread Color Black Weight 43 Thread Pitch 1 Clamp Style Std Rails Color Orange Defined Color Orange Gender Age Unisex Length 256 Material Synthetic Rail Material Chromoly Saddle Cut Out No Weight 224 Width 136 Color Black Rings 40 Number of Chainrings Single Crank Length (mm) 170 Crank Intended Use Gravel Drivetrain Speeds 12 Weight 812 BB Included No Pedal Spindle 9 16" Spindle Interface Type Shimano Hollowtech II Chainring BCD 110 Shimano Asymmetric Chainline Hub Compatibility 135 142 Road Disc Hubs > 415 mm Chainstay Defined Color Black border top:3px solid #f0f0f0