Shifters
Shimano BL-U6030-L Left Drop-Bar Brake Lever
Left brake only · hydraulic mineral oil
Requires Companion Components
Individual left brake lever requires a compatible right shift/brake control.
Compatibility: reviewed
Known specifications can be used by the compatibility engine.
Retailer offers
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Technical data
Specifications
- Control style
- Drop Bar Brake Lever
- Brake control interface
- Hydraulic Mineral Oil
- Compatible brake hoses
- Sm-Bh59-Jk-Ssr, Sm-Bh90-J-Ssr
- Control clamp diameter
- 23.8 mm
- Included control sides
- Left
- Left control functions
- Brake
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 CUES/ESSA drop-bar brake lever specifications
- productinfo.shimano.com/en/spec/lifestyle-active-shiftbrake-lever-hydraulic-disc-brake-drop-handlebar-typeManufacturerSource checked Jul 29, 2026Evidence reviewed Jul 29, 2026
- Shimano current lifestyle component ordering catalog
- set.shimano.co.jp/bc_catalog/comfort.pdfManufacturerSource checked Jul 29, 2026Evidence reviewed Jul 29, 2026