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- Same light shifting operation as top tier systems- 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: Yes- Servo Wave Mechanism: Yes- Tooled Reach Adjust: Yes- Compatible Derailleur Type: 11-speed road- 1x11 Recommended Cassettes: CS-M8000, 11-40t/11-42t- 2x11 Recommended Cassettes: CS-R8000, 11-30t/11-32t; CS-HG800-11, 11-34t- Includes OT-SP41 shift housing, and Polymer coated cables