Shimano GRX BR-RX820 + BL-RX820 Disc Brake

Shimano GRX Gravel disc brake with BR-RX820 brake caliper and BL-RX820 brake lever for front wheel

The hydraulic Shimano GRX disc brake for gravel use combines the BR-RX820 front brake caliper with the BL-RX820 brake lever. It is mounted on the left side of the drop bars and is therefore perfect for 1x setups, which only require a shift/brake lever on the right. The BL-RX820 gives you more control on mixed surfaces and is easy to use. The lever and lever body ergonomics have been specially adapted for gravel use and for flared handlebars. The aluminium lever has a textured coating to prevent slipping. The reach of the lever can be adjusted with the help of a hex key. The pad engagement point is also adjustable. You also benefit from Shimano Servo Wave technology for a more targeted application and a more efficient use of braking power.
The BR-RX820 flat-mount brake caliper impresses with excellent brake control, improved modulation and faster conversion of inputs. It is built more compactly than its predecessor and has 10% more space for the brake pads, which reduces noise. The simple bleeding process via one-way bleeding is well known. The BR-RX820 is made of lightweight aluminium, has two brake pistons made of synthetic resin and a straight hose connection. The disc brake is supplied with a brake hose and organic pads with Ice-Tech cooling fins for heat dissipation. Of course, it is also compatible with sintered pads and can be combined with brake rotors from 140 to 180 mm.

Specifications:

Series:

GRX RX820

Application:

Gravel

Type:

hydraulic, 2 pistons

Actuation:

mineral oil

Hose:

SM-BH90-JK-SSR

Hose Length (Front/Rear):

1000 mm

Technical Information - Caliper:

Mount:

flat mount

Pads:

resin with cooling fins

Design:

2-piece

Calliper Material:

aluminium

Piston Material:

resin

Hose Connection:

straight

Technical Information - Lever:

Adjustment Options:

Grip width adjustment (screw), pressure point adjustment

Mount:

clamp (closed)

Design:

left (side-specific)

Brake Lever Material:

aluminium

Brake Lever Housing Material:

composite

Hose Connection:

straight

Compatibility:

Brake Lever:

Mounting Position:

left (for rear brake caliper)

Clamp Diameter:

23.8 - 24.2 mm

Additional Brake Lever:

BL-RX812

Brake Caliper:

Mounting Position:

front wheel

Brake Rotor:

140 mm, 160 mm, 180 mm (recommended: RT-CL800)

Pads:

organic and sintered; with narrow pad shape; standard and Ice Tech brake pads

Features:

Brake Lever:

• hydraulic disc brake lever for gravel use
• for left-hand mounting on drop bars with 1x drivetrains
• great brake control on mixed terrain
• gravel-specific lever and lever body ergonomics
• reach adjustment (10.9 mm) with 2 mm hex tool
• faster brake contact thanks to Servo Wave
• anti-slip brake lever
• bracket optimised for flared handlebars
• funnel venting with M7 funnel
• lacquered brake lever

Brake Caliper:

• hydraulic disc brake caliper with flat-mount design for gravel use
• more control through better modulation
• faster initiation of the braking process
• less noise thanks to 10% larger brake pad spacing
• more compact than predecessor model
• simple bleeding process
• 2 pistons made of synthetic resin
• painted
• steel bolts (4 mm)

Technology:

Servo Wave
Shimano Servo Wave technology optimises the travel of your brake levers. During the braking process, the brake pads are guided quickly to the brake rotor with very short lever travel. The greater part of the lever travel is reserved for the actual braking force. In this way, you can apply your braking power in a more targeted manner and use it more effectively.

One Way Bleeding
One Way Bleeding is a technique used on Shimano calipers that facilitates brake bleeding. The hose routing has been optimised so that no air bubbles remain in the brake calliper. In combination with the funnel, the brake can be bled cleanly and easily.

Manufacturer Number:

IRX8204DLF6SC100

Contents:

• 1 x Shimano GRX BR-RX820 + GRX BL-RX820 disc brake, front
• 1 x Shimano SM-BH90-JK-SSR brake hose, 1000 mm (front)
• 1 x pair Shimano resin brake pads with cooling fins
• 1 x disc brake adapter for front 140/160 + 160/180 mm
• 1 x hose connection sets
• 2 x type A caliper bolts
• ready for installation, filled, bleeding is recommended after installation

Order Together:

• TL-BH61 tool for insert installation

Optional accessories:

• K05S-RX Resin Pads
• L04C-MF Metal Pads w/ Cooling Fins