Shifters
Shimano Shimano Tiagra ST-R4020 Shift/Brake Lever
Left · 2-speed front shift / hydraulic brake
Requires companion components
Individual left control requires the matching opposite-side ST-R4020 control.
Compatibility: reviewed
Known specifications can be used by the compatibility engine.
Retailer offers
Where to Buy
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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 29, 2026
- Compatibility review
- Reviewed Jul 29, 2026
Approved technical sources
- Shimano 2026-2027 component line-up chartManufacturerSource checked Jul 29, 2026Evidence reviewed Jul 29, 2026
- Shimano current road component ordering catalogManufacturerSource checked Jul 29, 2026Evidence reviewed Jul 29, 2026
- Shimano front drivetrain compatibility C-455ManufacturerSource checked Jul 29, 2026Evidence reviewed Jul 29, 2026
- Shimano hydraulic hose and caliper compatibility C-186ManufacturerSource checked Jul 29, 2026Evidence reviewed Jul 29, 2026
- Shimano road hydraulic shift/brake lever specificationsManufacturerSource checked Jul 29, 2026Evidence reviewed Jul 29, 2026
Technical data
Specifications
- Speeds
- 11-speed
- Supported speeds
- 11-speed
- Compatible drivetrain families
- Shimano Tiagra R4000 mechanical 11-speed
- Front drivetrain groups
- Shimano C455 Tiagra R4000 2x11
- Front speeds
- 2x
- Shift actuation
- Mechanical
- Control style
- Drop Bar Integrated
- Brake control interface
- Hydraulic Mineral Oil
- Compatible brake hoses
- Sm-Bh59-Jk-Ssr
- Control clamp diameter
- 23.8 mm
- Included control sides
- Left
- Left control functions
- Brake, Front Shift