The Shimano Dura-Ace ST-R9120-R brings flagship road performance to riders who demand the feel of mechanical shifting with the stopping confidence of hydraulic disc brakes. As the right-hand lever in the Dura-Ace R9100 groupset, it controls your rear derailleur with a shorter, crisper throw while delivering consistent, weather-resistant braking through Shimano's proven SERVOWAVE hydraulic system.

Highlights

• Dura-Ace R9100 series — Shimano's flagship road groupset
• Hydraulic disc brake actuation with SERVOWAVE progressive feel
• 11-speed mechanical shifting via cable-actuated rear derailleur
• Redesigned internal shifting unit for shorter lever stroke and faster release
• 14mm brake lever reach adjustment (pre-set at 10mm from bar)
• Mineral oil hydraulic fluid system
• Textured rubber hood for improved grip and all-weather comfort
• Includes OT-SP41 pre-greased polymer-coated shift cable and housing

Shifting Performance

The ST-R9120-R's redesigned internal shifting mechanism delivers a noticeably shorter lever throw compared to previous generations — approximately 24% reduction on the main shift lever. The release lever is equally responsive, eliminating hesitation and making rapid sequential shifts feel immediate and certain. The lever integrates smoothly into the Dura-Ace R9100 drivetrain for precise, reliable gear changes under load.

Hydraulic Braking

SERVOWAVE technology profiles the lever travel so initial movement quickly takes up pad-to-rotor gap, then transitions to a progressive, powerful braking feel as you squeeze. The result is shorter lever movement to achieve full braking force. The hydraulic system uses mineral oil and is sealed to perform consistently in wet or dry conditions, with no cable stretch degrading performance over time.

Ergonomics & Setup

The hood is shaped for comfort across all hand positions on drop bars with 23.8–24.2mm clamping diameter. Brake lever reach adjusts up to 14mm, allowing riders to dial in their preferred brake feel regardless of hand size. The textured rubber hood cover improves grip and dampens road vibration on long rides. A 2,200mm inner shift cable is included to suit most frame configurations.

Compatibility & Fit

The ST-R9120-R is the right-hand lever only, pairing with the ST-R9120-L left lever to complete the control set. It is designed for use with Shimano Dura-Ace R9100 series components and is compatible with Shimano 11-speed road rear derailleurs (mechanical). Brake hose connects to Shimano hydraulic disc brake callipers (Dura-Ace BR-R9170 or compatible). Fits standard drop bars with a 23.8–24.2mm clamp diameter. Hydraulic fluid: Shimano mineral oil.