Shifters
Shimano GRX ST-RX610-L Left Shift / Brake Lever
Left · hydraulic brake / front shift
Requires Companion Components
Independently sold control requires its compatible opposite-side control and brake system.
Purchase option
Matching Retail Brake Kit
ST-RX610-L + BR-RX410 Front Brake Kit includes the matching control and caliper. This retail kit is a purchase option. Check the complete bike's stock specification before assuming it shipped with this exact retail SKU.
Compatibility: reviewed
Known specifications can be used by the compatibility engine.
Retailer offers
Where to Buy
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Technical data
Specifications
- Speeds
- 12-speed
- Supported speeds
- 12-speed
- Compatible drivetrain families
- Shimano GRX 12-speed, Shimano 105 mechanical 12-speed
- Front drivetrain groups
- Shimano C455 Grx 2x12, Shimano C455 105 Mechanical 2x12
- Front speeds
- 2x
- Shift actuation
- Mechanical
- Control style
- Drop Bar Integrated
- Brake control interface
- Hydraulic Mineral Oil
- Control clamp diameter
- 23.8 mm
- Included control sides
- Left
- Left control functions
- Brake, Front Shift
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
- Oct 13, 2026
- Compatibility review
- Reviewed Oct 13, 2026
Approved technical sources
- C-455 first2x12 SVG roadrow0Y103.551 andGRXrow1Y180.478 shareST-R7120/ST-RX610/ST-RX820 control rectangle
- productinfo.shimano.com/en/compatibility/C-455ManufacturerSource checked Oct 13, 2026Evidence reviewed Oct 13, 2026
- Shimano 2026 GRX component ordering catalog
- set.shimano.co.jp/bc_catalog/gravel.pdfManufacturerSource checked Aug 6, 2026Evidence reviewed Aug 6, 2026