Optimized for mixed-terrain riding, the GRX FC-RX820-1 crankset offers versatile gearing options with a 40T chainring and 12-speed HG chains for smooth, reliable shifts on gravel and adventure rides. Constructed with Hollowtech II technology, this crankset combines lightweight design with exceptional strength and stiffness, ensuring durability during demanding rides over varied terrains. Designed for gravel and adventure cycling, the FC-RX820-1 features a 170mm crank length, 110 BCD asymmetric chainring bolt circle diameter, and a 49.7mm chainline for optimal clearance and performance on disc brake hubs. Built with materials, this black crankset maintains corrosion resistance and long-lasting wear, making it perfect for seasoned riders seeking reliable performance in mixed-terrain conditions. Compatible with 12-speed HG chains and Hollowtech II bottom brackets (sold separately), the GRX FC-RX820-1 provides seamless integration for a custom gravel bike setup with enhanced efficiency and style. The Shimano GRX RX820 1x Crankset helps maximize our riding performance with its ideal balance of stiffness, weight savings, and durable strength delivered by the HOLLOWTECH II technology. This 1x crank is designed to work flawlessly with the GRX 12-speed gravel drivetrain, providing us with a range of gears for our best performance on the gravel.