Shimano GRX FC-RX820-2 31/48T

The new FC-RX820-2 crank balances weight and efficiency for mixed-terrain riding. Gearing options cater for the specific demands of gravel riding and to maintain tighter gear steps for maintaining pedaling rhythm. GRX 12 speed, hollow arm double crankset. 31-48T: Shimano's widest range gravel-oriented double crank. Tighter gear steps than 1X drivetrains make it easier to maintain pedaling rhythm Bottom Bracket: Not included - SM-BBR60 / SM-BB72 Chainline: 46.9mm Attributes BCD 80/110 BB Inclusion No Chainline 46.9mm Teeth 31/48 Crank Spindle Diameter 24mm Interface Hollowtech II Crankset Material Aluminum Pedals Thread 9/16'' Primary Color Black Speed 12 Drivetrain Spacing Road Disc