Shimano FC-RX610 GRX 1x12

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