Shimano GRX, with its gravel specific ergonomics, optimized gearing options, rugged reliability, and quiet and stable drivetrain, sets itself apart from the rest of the component world The GRX series offers premium performance at an incredible value, with thoughtful ergonomic designs and gravel-centric gearing for all manners of unpaved adventures.; Low profile flat mount design, providing control, modulation and power with minimal effort in mixed riding conditions Features: Simple set up and maintenance with easy and clean bleeding system Excellent heat dissipation Contains BR-RX810 flat mount brake caliper with pads, and adapter for 140/160 mm (without rotor) Rear caliper does not come with adapter SM-BH90-JK-SSR, SM-BH90-J-SSR Hose not included Recommended brake lever ST-RX810 BL-RX810 ST-RX815 Click here for compatible replacement brake pads: Shimano L05A-RF Disc Brake Pads - Resin Genuine, brand new, boxed Shimano product - Biketart are an official UK Shimano stockist.