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Shifters
Shimano GRX ST-RX820 Shift/Brake Lever
Left · 2-speed front shift
Requires companion components
Individual left brake/front-shift control requires a compatible right rear-shift/brake control; select both exact components to complete the controls.
Compatibility: reviewed
Known specifications can be used by the compatibility engine.
Retailer offers
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Catalog trust
Evidence and freshness
Technical-source dates and retailer offer checks are separate. A retailer check does not validate compatibility.
Report a correction- Technical review
- Jul 28, 2026
- Compatibility review
- Reviewed Jul 28, 2026
Approved technical sources
- Shimano ST-RX820-L specificationManufacturerSource checked Jul 28, 2026Evidence reviewed Jul 28, 2026
- Shimano front drivetrain compatibility C-455ManufacturerSource checked Jul 28, 2026Evidence reviewed Jul 28, 2026
- Y's Road ST-RX820-L exact Shimano package identityRetailerSource checked Jul 28, 2026Evidence reviewed Jul 28, 2026
Technical data
Specifications
- Speeds
- 12-speed
- Supported speeds
- 12-speed
- Compatible drivetrain families
- Shimano GRX 12-speed
- Front drivetrain groups
- Shimano C455 Grx 2x12
- Front speeds
- 2x
- Shift actuation
- Mechanical
- Control style
- Drop Bar Integrated
- Brake control interface
- Hydraulic Mineral Oil
- Included control sides
- Left
- Left control functions
- Brake, Front Shift