SHIMANO
Rear Disc Brake Caliper Shimano GRX BR-RX820 Flat Mount
Rear Disc Brake Caliper Shimano GRX BR-RX820 Flat Mount
The Shimano GRX BR-RX820 is a hydraulic 2-piston rear disc brake caliper with Flat Mount design, developed specifically for gravel and cyclocross bikes. It delivers powerful, precisely controlled braking performance while maintaining durability in demanding conditions.
The RX820 series reflects Shimano’s gravel philosophy – simplicity, reliability and adventure-ready performance. ICE TECHNOLOGIES heat management combined with L05A-RF resin brake pads with fins ensures excellent heat dissipation and consistent braking on long descents and rough terrain.
The Flat Mount design, ONE WAY BLEEDING system and J-kit hose connection make installation and servicing clean and straightforward. The aluminium caliper weighs approximately 134 g and allows quick wheel changes with convenient tool access.
- Application: Gravel / Cyclocross
- Group: GRX
- Model: BR-RX820-R
- Brake type: Hydraulic disc brake
- Mount: Rear
- Brake mount: Flat Mount
- Brake pads: L05A-RF Resin with fins
- Hose connection: Straight (J-kit)
- One-way bleeding: Yes
- Brake fluid: Shimano mineral oil
- Recommended lever: ST-RX820 / BL-RX820 / ST-RX820-LA
- Recommended hose: SM-BH90-JK-SS
- Recommended rotor: SM-RT800
- Material: Aluminum
- Weight: approx. 134 g
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Estonia
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Finland
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Shimano is a Japanese component manufacturer that since 1921 has been one of the world’s largest suppliers of bicycle drivetrains, brakes and cycling-specific parts. Shimano groupsets — from Tourney for city bikes to top-tier Dura-Ace — are found on virtually every serious bike brand. The company also makes fishing tackle and rowing components.