Shimano Ultegra Di2 Right Shift Brake Lever ST-R8170 / BR-R8170 12V

Shimano ULTEGRA Di2 ST-R8170 + BR-R8170 12-Speed ​​Rear Hydraulic Disc Brake Set

The Science of Speed ​​– Maximum Control, Perfect Precision

The new Shimano Ultegra Di2 ST-R8170 + BR-R8170 12-speed Dual Control hydraulic disc brake set is a high-end road bike brake-gear integration system developed by Shimano with its "The Science of Speed" philosophy.
Wireless electronic gear shifting, advanced SERVO WAVE braking technology, and optimized brake modulation ensure absolute control in every ride.

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🚴‍♂️ The Science of Speed: Shimano Ultegra Di2 R8170 Series

In developing the ULTEGRA Di2 series, Shimano aimed not only for "faster gear changes" but also for a safer, more balanced, and more efficient ride.
The new R8170 series stands out with its electronic shifting system that operates with low latency thanks to wireless Di2 technology, and its more powerful, quieter, and easy-to-maintain braking system .

The new BR-R8170 hydraulic caliper delivers confidence in all conditions with its optimized piston action and quieter braking.
The ST-R8170 Dual Control handlebars , with their rounded design that enhances hand ergonomics, provide a comfortable grip even during long rides.

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⚙️ Technical Specifications

• Usage Area: Road bike

• Group: Shimano ULTEGRA Di2 R8150

• Model: ST-R8170-R + BR-R8170

• Tip: Dual Control (STI) - Right side (rear brake / rear derailleur)

• Gears: 12 gears (rear)

• Mounting Type: Flat-Mount (rear)

• Brake Type: Hydraulic disc brake

• Brake Caliper: BR-R8170 (2-piston)

• Brake pads: L03A Resin (with fins)

• Brake Hose: SM-BH90-JK-SSR 1700mm (shortenable, oil-filled and assembled)

• Brake Fluid: Shimano Mineral Oil

• Recommended Rotor: RT-MT800 (140mm or 160mm)

• Gear Indicator Window: None

• Cable/Tube Routing: E-TUBE (EW-SD300 cable compatible)

• Number of eTube Ports: 2

• Di2 Wireless Chip: Yes (integrated)

• Battery Type: CR1632 x 1 (1.5–2 years lifespan)

• Ergonomic Handles: Improved grip, rounded brake levers.

• Cable Width: 23.8mm / 24.2mm

• One-Way Bleeding: Yes

• Weight: Not specified by the manufacturer (approximately 350g set)

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🔧 Innovative Features

• Wireless Di2 connection: Ultra-fast signal transmission thanks to Shimano's proprietary low-energy wireless protocol.

• Personalization with the e-TUBE app:

  • Gear speed adjustment

  • Fully/semi-synchronized gear shifting mode selection

  • Defining custom functions through button assignments.

• SERVO WAVE Technology: More precise braking, maximum power with minimum crank movement.

• Hydraulic system: Quieter, easier to maintain.

• New caliper design: Less friction, optimized piston alignment.

• Quick and easy wheel removal/installation feature.

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🧠 Shimano Technologies

🔹 SEIS – Shimano Electronic Intelligent System

SEIS is a fully electronic version of Shimano's classic SIS (Shimano Index System) principle.

• Gear changes are not mechanical; they occur entirely electronically .

• Thanks to wireless communication, dirt, tangled cables, or weather conditions won't affect performance.

• Flawless gear changes with a single touch, even in cold weather, fatigue, or challenging terrain.

• Natural operation thanks to a structure similar to mechanical Dual Control levers.

🔹 E-TUBE Platform

Shimano's digital connectivity platform, E-TUBE:

• Easy installation with the "Plug & Play" system.

• Resistant to corrosion, elongation, and freezing.

• Software updates can be performed via computer or smart device connection (using the SM-PCE1 module).

• It provides interactive signal transmission and power management between all components.

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📦 Box Contents

• 1 x Shimano Ultegra Di2 ST-R8170 Right STI Dual Control Lever (rear)

• 1 x Shimano Ultegra BR-R8170 Flat-Mount Disc Brake Caliper

• 1 x L03A Resin Brake Pad (with fins)

• 1 x SM-BH90-JK-SSR 1700mm Brake Hose (oil filled and assembled)

• 2 x 38mm Caliper Screws

• 1 x Tube Joint Kit

• 1 x CR1632 Battery

⚠️ Disk Rotor (RT-MT800 Center-Lock) is not included in the box.

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🏭 Technical Information and Manufacturer

• Manufacturer Code: IR8170DRRDSC170F

• EAN: 4550170241018

• UPC: 192790241012

• Manufacturer:
  SHIMANO INC.
  3-77 Oimatsu-cho, Sakai-ku, Sakai-shi
  590-8577 Osaka, Japan
  🌐 www.shimano.com

• European Representative:
  Shimano Europe BV
  High Tech Campus 92
  NL-5656 Eindhoven, Netherlands