Designed for riding on rough roads, through gravel and mud, to be able to carry on in comfort, stress-free, to wherever you want, to allow you to achieve that unique sense of accomplishment. The first groupset designed for Gravel riding Explore beyond Gravel inspired lever and bracket ergonomics Anti-slip brake lever Greater mixed-terrain control Series: Shimano GRX 11-speed Brake Fluid: Shimano mineral oil Recommended Brake Caliper: BR-RX810 (sold separately) Compatible Brake Hose Kit: SM-BH90-JK-SSR (sold separately) Recommended Brake Rotor: SM-RT800 (sold separately) Free Stroke Adjust: No Servo Wave Mechanism: Yes Tooled Reach Adjust: Yes Compatible Derailleur Type: 1x for 11-speed road 1x11 Recommended Cassettes: CS-M8000, 11-40t/11-42t