The Shimano CUES ST-U3030-10R brings the ergonomic refinement of higher-end dual control levers to recreational road and gravel riders. Designed for 10-speed mechanical disc brake drivetrains, this right-hand STI lever combines shifting and braking in a single intuitive unit — ideal for cyclists stepping into drop bar riding without compromising on feel or function.

Highlights

• New Super SLR brake actuation: A friction-reducing mechanism between lever and cable delivers crisp, responsive braking with excellent modulation through mechanical disc callipers.
• Ergonomic lever shape: Lever design inherited from Shimano's higher-grade mechanical dual control levers for a comfortable grip across a range of hand sizes.
• Reach adjust: Screw-type reach adjustment lets you dial in the lever position to suit your hand size and riding preference.
• Optimised cable routing: Compatible with OT-SP41 outer casing and Optislick-coated inner cables for smooth, consistent shift and brake actuation.
• Right-hand only: Controls rear brake and rear derailleur; pairs with a separate left-hand lever for complete dual control setup.
• Built for the CUES ecosystem: Designed to work seamlessly with Shimano CUES rear derailleurs, cassettes, and chains across the flat bar and drop bar lineup.

About Shimano CUES

Shimano CUES is a unified groupset platform designed to make quality, durable drivetrain components accessible to more riders. The U3030 series extends CUES to drop bar road and gravel bikes, offering 9- and 10-speed mechanical disc brake options at an approachable price point. The system is built around an 11-speed chain standard across the CUES range, meaning cassettes, chains, and rear derailleurs are shared between flat bar and drop bar configurations — simplifying setup, servicing, and upgrades.

Compatibility & Fit

This lever is designed for 10-speed drivetrains and is compatible with Shimano CUES mechanical disc brake callipers (short pull actuation). Clamp band diameter: 23.8–24.2mm (suits standard drop bar diameter). Outer casing: OT-SP41 (lever side and rear derailleur side — sealed). Compatible with Optislick and steel inner cables. This is the right-hand lever only; the rear derailleur cable controls the rear derailleur. For a complete setup, pair with a compatible Shimano CUES left-hand lever. Not compatible with hydraulic brake callipers.