Lightweight and durable Hollowtech II spindle interface optimizes power transfer and longevity for demanding gravel and mixed-terrain riding. Constructed with materials featuring a 40t single chainring and 110 BCD for versatile gear range and compatibility with a variety of 12-speed HG chains, enhancing performance. Designed for gravel and off-road adventures, this 165mm crankset offers optimal 49.7mm chainline and a 151mm Q-factor, ensuring comfortable riding stance and efficient pedaling across challenging terrains. Sleek black finish provides a stylish and professional look suitable for adventure, gravel, and all-road cycling, while its engineering supports close gear steps or wide range configurations with optional cassettes (sold separately). Innovative features include an asymmetric 110mm BCD and compatibility with 135/142 mm road disc hubs, making this crankset a versatile choice for custom gravel builds and performance-focused cycling setups. Experience unrivaled performance and versatility with the GRX FC-RX610-1 Crankset - the perfect choice for gravel, cyclocross, and mixed-terrain riders seeking optimized efficiency and durability. Crafted with precision materials and innovative technology, this 12-speed crankset elevates your riding experience, whether tackling rugged trails or exploring on paved paths. Materials & Construction Built with 's Hollowtech II spindle interface, the FC-RX610-1 features lightweight, high-strength aluminum crank arms designed for durability and reduced weight (812g). The black finish not only offers a sleek, modern look but also enhances corrosion resistance, making it ideal for all-weather cycling adventures. Performance & Engineering Excellence Designed specifically for gravel and mixed-terrain riding, this crankset offers an optimal 49.7mm chainline compatible with 135/142mm road disc hubs and 415mm chainstays. The 165mm crank arm length provides a balanced riding position, enhancing comfort and power transfer across varied terrains. The 110 BCD asymmetric chainring bolt circle diameter accommodates 40t chainrings (sold separately), ensuring efficient pedaling and smooth gear shifts. Advanced Components & Technology Pair the FC-RX610-1 with HG 12-speed chains and the versatile 10-45t or 10-51t cassettes (sold separately) to customize your gearing for climbing steep grades or maintaining high speeds on flats. The single chainring setup simplifies drivetrain maintenance and reduces weight while offering a comprehensive gear range suited for aggressive gravel riding or endurance adventures. Style & Use Case With its sleek black aesthetic, this crankset complements any bike setup, adding a professional, high-performance look. Whether you're a gravel enthusiast, cyclocross racer, or adventure rider, the FC-RX610-1 excels in mixed-terrain environments, delivering reliable power transfer and precise shifting for confident riding across d