Shimano Ultegra ST-R8170 Shift/Brake Lever

The Shimano Ultegra ST-R8170 Shift/Brake Lever combines fast wireless Di2 shifting with powerful hydraulic disc braking to deliver outstanding performance for road cyclists. Sharing technology developed for DURA-ACE, the ST-R8170 offers precise gear changes, refined ergonomics and enhanced braking control, allowing you to ride faster and with greater confidence.

Featuring Shimano's proven SERVO WAVE brake technology, the Ultegra ST-R8170 provides improved modulation and lever feel while the wireless Di2 platform creates a cleaner cockpit with easier installation and maintenance. Designed for performance road bikes, it delivers the speed, reliability and efficiency expected from Shimano's flagship electronic shifting systems.

Wireless Di2 Shifting

The wireless Di2 shifter communicates seamlessly for fast, accurate and reliable electronic shifting while reducing cockpit clutter for a cleaner, more aerodynamic setup.

SERVO WAVE Hydraulic Braking

Shimano's SERVO WAVE technology increases braking modulation by expanding the control zone throughout the lever stroke, delivering more precise braking and greater confidence in all riding conditions.

Refined Ergonomics

Developed using feedback from professional riders, the raised hood profile and smoother lever action provide improved hand comfort, natural control and reduced fatigue on long rides.

Compatible & Expandable

The ST-R8170 supports both wired and wireless Di2 configurations and includes dedicated ports for SD300 wiring and compatible satellite shifters, allowing riders to customise their shifting setup.

Long Battery Life

Powered by easily replaceable CR1632 batteries, each shifter delivers approximately 1.5 to 2 years of battery life under normal riding conditions.

Why You'll Love It

• Wireless Shimano Di2 electronic shifting.
• SERVO WAVE hydraulic braking for improved modulation.
• Professional-level ergonomics with raised hood design.
• Smooth, light lever action for enhanced comfort.
• Compatible with wired and wireless Di2 systems.
• Supports SD300 satellite shifters.
• Easy-to-replace CR1632 batteries.
• Ideal for high-performance road bikes.

Specifications 

Shifter Model: ST-R8170-R

• Series: Ultegra R8100
• Rear speed: 12
• Firmware update by E-Tube project: ✔
• Remote switch: ✔
• Port for remote sprinter shifter (pcs): 0
• Brake lever (clamp band): 23.8-24.2mm
• Brake lever (reach adjust): ✔
• Brake lever (fluid): Shimano mineral oil
• Brake lever (free stroke adjust): ✔
• Brake lever (servo wave): ✔
• Brake hose (Kit): SM-BH90-JK-SSR
• Brake lever (funnel bleeding): ✔
• Brake lever (hose joint): Straight
• Battery: CR1632
• Compatible with wired & wireless Di2 shifting: ✔
• SD300 port (pcs): 1
• Port for SD300 satellite shifter (pcs): 1

Shifter Model: ST-R8170-L

• Series: Ultegra R8100
• Front speed: 2
• Firmware update by E-Tube project: ✔
• Remote switch: ✔
• Port for remote sprinter shifter (pcs): 0
• Brake lever (clamp band): 23.8-24.2mm
• Brake lever (reach adjust): ✔
• Brake lever (fluid): Shimano mineral oil
• Brake lever (free stroke adjust): ✔
• Brake lever (servo wave): ✔
• Brake hose (Kit): SM-BH90-JK-SSR
• Brake lever (funnel bleeding): ✔
• Brake lever (hose joint): Straight
• Battery: CR1632
• Compatible with wired & wireless Di2 shifting: ✔
• SD300 port (pcs): 1
• Port for SD300 satellite shifter (pcs): 1

Features

• Wireless Shimano Di2 shifting.
• SERVO WAVE hydraulic braking technology.
• Raised hood profile for improved ergonomics.
• Enhanced braking modulation and control.
• Light and smooth lever operation.
• Compatible with wired and wireless Di2 systems.
• Supports SD300 satellite shifters.
• Long-lasting CR1632 batteries.
• Firmware updates via Shimano E-TUBE PROJECT.
• Designed for Shimano Ultegra R8100 12-speed road groupsets.

The Shimano Ultegra ST-R8170 Shift/Brake Lever delivers race-proven Di2 performance with lightning-fast wireless shifting, confident hydraulic braking and refined ergonomics. Whether you're racing, training or tackling long endurance rides, it offers the precision, control and reliability that define Shimano Ultegra.