Shimano GRX FC-RX610-1 40T

The new FC-RX610-1 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, 1X crankset. Narrow-wide 40T chainring. Gravel specific gearing ratios with 1X simplicity and wide-range gearing. Bottom Bracket: Not included - BB-RS500/BB-RS500-PB. Chainline: 50.1mm. Attributes BCD 110 BB Inclusion No Chainline 49.7mm Teeth 40 Crank Spindle Diameter 24mm Crankset Material Aluminum Pedals Thread 9/16'' Primary Color Black Speed 12 Drivetrain Spacing Road Disc