Shimano Dura-Ace ST-R9170 Di2 Hydraulic Disc Brake STI Lever & Caliper Set (Left/Rear) – Elite Road Bike Performance
Pro-Level Di2 Electronic Shifting & Hydraulic Disc Braking
The Shimano ST-R9170 Hydraulic Disc Di2 STI Set (Left/Rear) delivers top-tier road cycling performance, combining precision electronic shifting with powerful hydraulic disc braking. As part of the flagship Dura-Ace R9170 groupset, this system is engineered for riders who demand ultimate control, responsiveness, and reliability in all conditions.
- Dura-Ace Di2 electronic shifting system
- Integrated hydraulic disc brake lever
- Compatible with E-Tube wiring system
- Lightweight carbon and titanium construction
- Smooth, precise, and reliable road bike performance
- Ideal for competitive and high-performance cycling
Perfect for road racing, endurance riding, and high-performance cycling, this setup offers effortless gear changes and exceptional braking modulation.
Shimano Di2 Electronic Shifting | Fast, Accurate & Effortless
Powered by Shimano Di2 E-Tube technology, this STI lever provides:
- Instant, precise gear changes at the touch of a button
- Consistent shifting performance without cable stretch or contamination
- Smooth operation even in wet, cold, or demanding conditions
- Ergonomic tactile shift buttons for intuitive control
Say goodbye to mechanical cables, electronic shifting ensures flawless performance every ride.
Hydraulic Disc Braking for Maximum Control & Modulation
The integrated hydraulic brake lever and BR-R9170 flat mount caliper deliver:
- Powerful, consistent stopping performance in all weather conditions
- Excellent modulation and control, especially from the hood position
- Auto-adjusting pad clearance via hydraulic reservoir system
- Reduced hand fatigue with less effort required for braking
Lightweight, Race-Ready Construction
- Carbon fibre lever blades for reduced weight and stiffness
- Carbon composite bracket body for strength and durability
- Titanium clamp band and fixing bolt for weight savings
- Approximate weight: 360g per pair
Designed for riders seeking lightweight performance without compromise.
Ergonomic Design & Custom Fit
- STI lever design with familiar Shimano layout
- Reach adjust for personalised hand positioning
- Free stroke adjustment for fine-tuning brake engagement
- Comfortable operation for long rides and race conditions
E-Tube Compatibility & Easy Integration
- Compatible with Shimano E-Tube Di2 system
- Features dual E-Tube ports for system connectivity
- Electrical wires/cables sold separately for custom setup
What’s Included
- 1 × Shimano ST-R9170 Left STI Lever (pre-bled)
- 1 × BR-R9170 Flat Mount Rear Brake Caliper
- Brake hose and Shimano mineral oil
- Brake pads pre-installed
- Note: Rotors, adapters, and Di2 cables not included
The Shimano ST-R9170 Di2 STI Set delivers elite-level Shimano Dura-Ace performance with industry-leading electronic shifting precision. It offers superior hydraulic braking power and modulation, and is designed for serious road cyclists and racers. It provides proven reliability in all weather conditions.