Gravel riders demand braking systems they can trust, especially when tackling steep, technical descents.
The Shimano GRX 12-speed ST-RX820 STI paired with BR-RX820 Flat-Mount hydraulic disc caliper delivers exactly that—powerful, reliable deceleration when you need it most. This right-hand shifter and brake lever combination offers excellent modulation and stopping power, giving you the confidence to push harder on demanding terrain. The hydraulic system provides consistent performance in all conditions, while the flat-mount design integrates seamlessly with modern gravel frames. Built for adventure, engineered for control.
Features
- Greater mixed-terrain control
- Gravel inspired lever and bracket ergonomics
- Anti-slip brake lever
- Same light shifting operation as top tier road systems
- Never hesitate to tackle rough surfaces
- Excellent heat dissipation
- ICE TECHNOLOGIES
- Flat mount
- Simple set up and maintenance
- Convenient tool access
- Easy hose joint system (J-kit)
- Simple wheel replacement
- Easy and clean bleeding system
- ONE WAY BLEEDING
Specification
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Use: Gravel, Cyclocross
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Group: GRX
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Model: ST-RX820-R
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Type: Dual-Control (STI)
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Handlebar mounting: right
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Gear rear: 12-speed
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Optical gear display: No
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Lever reach adjust: Yes, with tool
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Handlebar diameter: 23.8mm/24.2mm
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Brake-type: Hydraulic Disc Brake
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Brake caliper: BR-RX820-R
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Brake mounting: Flat-Mount
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Brake pads: L05A-RF Resin with Fin
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One-Way bleeding: Yes
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Brake fluid: Mineral oil
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Recommended brake rotor: SM-RT64, SM-RT70, SM-RT800
Material
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Lever: Aluminium
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Caliper: Aluminium
Colour
Weight
- Approx. 287g ST-RX820
- Approx. 134g BR-RX820
Contents
- 1 x GRX ST-RX820 12-speed STI Dual Control right
- 1 x GRX BR-RX820 Flat-Mount Brake Caliper
- 1 x Brake Pads L05A-RF Resin with Fin
- 1 x Brake Hose SM-BH90-JK-SS
- 2 x Screw for brake caliper (38mm)
- 1 x Tube Joint Kit
- 1 x Gear wire (Optislick)
- 1 x Gear cable SIS OT-SP41
- 1 x Gear cable SIS OT-SP41
- 1 x End caps
The brake hose SM-BH90-JK-SS is filled with mineral oil and pre-mounted on on the caliper BR-RX820!
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.
Weights are based off pre-production products at time of publication. Weights may vary in final production.
