Shimano GRX Disc Brake BR-RX820 + ST-RX820-LA Remote

Shimano GRX Gravel disc brake with BR-RX820 brake caliper and ST-RX820-LA brake lever remote for front wheel

The hydraulic Shimano GRX disc brake for gravel use combines the BR-RX820 front brake caliper with the ST-RX820-LA brake lever. This is an STI that can control a mechanical dropper seatpost instead of shifting. It is mounted on the left side of the drop bars and is therefore perfect for 1x setups, which only require a regular shift/brake lever on the right. The integration of the remote function into the brake lever is not only practical, it also makes for a tidier cockpit. You have a maximum of 10 mm of cable stroke at your disposal. As far as braking is concerned, ST-RX820-LA impresses with more control on mixed surfaces and with ease of 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 cable, cable housing, 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

Front Hose Length:

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 (with remote function for dropper seatpost):

Handlebar Type:

Dropbars

Mounting Position:

left (for rear brake caliper)

Clamp Diameter:

23.8 - 24.2 mm

Additional Brake Lever:

BL-RX812

Seatpost:

mechanical, cable on the side of the post, maximum 10 mm cable stroke

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 with remote function for mechanical dropper posts
• for left-hand mounting on drop bars with 1x drivetrains
• uncluttered cockpit reduces stress, increases riding pleasure
• 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
• 10 mm tow length
• Optislick cable for actuating the seatpost, with a minimal galvanic coating for more efficient cable routing and corrosion resistance
• funnel venting with M7 funnel

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:

IRX8203DLF6SC100A

Contents:

• 1 x Shimano GRX BR-RX820 + GRX ST-RX820-LA 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
• 1 x Shimano cable
• 1 x Shimano OT-SP41 cable housing
• 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