Shimano GRX RX820 Gravel Rear Hydraulic Disc Brake Kit 1x12-Speed

The Shimano GRX RX820 rear hydraulic brake kit combines a brake lever with a shifter and a disc brake calliper. It is for riders using a gravel bike with a 12-speed drivetrain who want precise braking.

• Brake lever and shifter in one unit, for cleaner handling
• Compatible with 12-speed double drivetrains
• 2-piston calliper with a flat design and Flatmount fitting
• Organic brake pads with cooling fins to dissipate heat
• Complete kit for the rear wheel: right lever, calliper, brake pads and 1700 mm hose

Technical specifications

• Compatibility: 12-speed, double
• Calliper mount: Flatmount (BR-RX820)
• Calliper: BR-RX820, 2 pistons (resin), flat design
• Brake pads: L05A-RF, with cooling fins, organic
• Brake hose: SM-BH90-JK-SSR (J-KIT DIRECT version), 1700 mm (rear wheel)
• Lever weight: approx. 289 g (right)
• Calliper weight: approx. 136 g (rear)
• Brake fluid: SHIMANO mineral oil
• Package contents (rear): 1 ST-RX820 lever (12-speed, rear, right); 1 BR-RX820 calliper with 1 set of brake pads and 25 mm mounting bolt
• Additional contents (rear): 1 SM-BH90 hose, 1700 mm; 1 polymer-coated gear cable

Founded in 1921 in Sakai, Japan, by Shozaburo Shimano, Shimano is still based in the same city today. For cyclists, it makes drivetrains, brakes, wheels, pedals and cycling shoes. Its history in bicycle components began with the production of freewheels in 1922.