Shimano, GRX BR-RX820, Road Hydraulic Disc Brake, Rear, Flat mount, 140 or 160mm (not included), 140g

Description

With a low-profile flat mount design, the GRX BR-RX820 hydraulic disc brakes provide greater control for mixed-terrain riding.* 10% wider pad clearance decreases brake noise* 2-Piston RX810 flat mount and anti-mud hydraulic disc brake caliper* Maintenance-friendly bleeding process* Excellent heat dissipation* Convenient tool access* Includes L03A resin pads with improved wear resistance