Shimano Ultegra ST-R8170-R Di2 Right Shifter/Disc Brake Lever – Wireless Precision, Pro-Level Control
Designed for precision riders and performance builds, the Shimano Ultegra ST-R8170-R brings cutting-edge Di2 wireless shifting and refined brake modulation to your right-hand cockpit control.
Part of Shimano’s 12-speed ULTEGRA R8100 series, this right-side Dual Control Lever features wireless connectivity for a clean, aerodynamic setup and near-instant electronic shifting. Shimano's trusted SERVO WAVE technology ensures rapid pad engagement followed by progressive braking power, giving you exceptional modulation and confidence on technical descents or tight corners.
Engineered with feedback from pro riders, the lever features a raised hood peak and an ergonomic profile that enhances grip and comfort across every riding position. The ST-R8170-R is also fully compatible with additional satellite shifters and is easily personalised using the Shimano E-Tube Project App.
Key Features:
- Right-hand 12-speed Dual Control Lever for Di2 shifting and hydraulic disc braking
- Wireless Di2 connectivity delivers fast, reliable shifting and a clean cockpit
- SERVO WAVE technology for faster initial pad contact and greater braking modulation
- Raised hood peak and ergonomic redesign improve comfort and control
- Compatible with Shimano’s E-Tube Project App for firmware updates and custom shift settings
- Accepts SD300 satellite shifter integration for cockpit customisation
- Mineral oil hydraulic braking with funnel bleed compatibility
- Long battery life with easy-to-replace CR1632 coin cell (1.5 to 2 years typical use)
- Reach and free stroke adjust to suit different hand sizes and preferences
Technical Specifications:
- Model: ST-R8170-R (Right Side Only)
- Series: Shimano ULTEGRA R8100
- Speeds: 12-speed (rear shifting)
- Shifter Type: Dual Control Lever (Di2 Electronic)
- Brake Compatibility: Hydraulic disc, recommended with BR-R8170 caliper
- Brake Hose: SM-BH90-JK-SSR (straight joint, black)
- Oil Type: Shimano Mineral
- Clamp Diameter: 23.8–24.2 mm
- Connectivity: Wireless and wired Di2
- Satellite Shifter Ports: 1x SD300
- SD300 Port Count: 1
- Battery: CR1632 (user-replaceable)
- Firmware Updates: Via Shimano E-Tube Project
- Reach Adjust: Yes (with bolt)
- Free Stroke Adjust: Yes
- Average Weight: Approx. 196 g (right side only; total pair weight: 391 g)
- Funnel Bleed Compatible: Yes
- Intended Use: Road, endurance, and race cycling setups
