The GRX FC-RX610-2 provides 46/30T gearing for a 2×12 gravel drivetrain. This black 170mm version uses aluminum arms and rings, a four-bolt ring mount and Shimano’s 24mm Hollowtech II spindle.
Its 47mm chainline is part of the fit check alongside the front derailleur and frame requirements. The bottom bracket is not included. Choose the double-chainring RX610-2 version deliberately when replacing a GRX crankset rather than treating it as equivalent to a 1x model.





