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 10-speed Brake Fluid: Shimano mineral oil Recommended Brake Caliper: BR-RX400 (sold separately) Compatible Brake Hose Kit: SM-BH90-JK-SSR (sold separately) Recommended Brake Rotor: SM-RT64 (sold separately) Tooled Reach Adjust: Yes Compatible Derailleur Type: 10-speed road 2x10 Recommended Cassettes: CS-HG500-10, 11-32t/11-34t; CS-HG50-10, 11-36t Includes Optislick cables