• 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• Low profile flat mount design GRX hydraulic disc brake calliper gives you control, modulation and power with minimal effort in all riding conditions• Simple set up and maintenance with easy and clean bleeding system• Contains BR-RX820 flat mount front brake calliper with pads, and adapter for 140/160 mm (without rotor).