Shimano FC-RX610 GRX chainset 46 / 30, double, 12-speed, 2 piece design, 170 mm

From Shimano:

• Shimano GRX, with its gravel specific ergonomics, optimized gearing options, rugged reliability, and quiet and stable drivetrain, sets itself apart from the rest of the component world
• 12-speed single chainset offers optimum gearing for mixed terrains and riding styles
• Designed to work with HollowTech II type bottom bracket cups
• Compatible with 12-speed HG chains
• Anodized aluminium crank arms
• Lightweight aluminium chainring
• 4 arm, 110 mm bolt circle diameter