Shimano Ultegra Di2 ST-R8170 2×12-Speed Shifters

The ST-R8170 Dual Control Levers bring the lightning-fast, semi-wireless shifting of the flagship Dura-Ace series to the high-performance Ultegra tier. Designed for the 12-speed era, these shifters utilize a proprietary wireless connection to communicate with the derailleurs, eliminating the need for wires through the handlebar and stem for a sleek, modern cockpit. The ergonomics have been completely overhauled with a raised hood peak and increased offset to provide more hand support and a more secure "aero-tuck" position. Featuring "Servo Wave" technology, the R8170 offers exceptional brake modulation and a lighter lever pull, ensuring total confidence on technical descents. With a battery life of up to 2 years and professional-grade shifting speed, the Ultegra R8170 is the perfect balance of elite performance and exceptional value.

Key Features

• Semi-Wireless Di2: Wireless cockpit integration simplifies bike assembly and provides a clean, cable-free aesthetic.

• Refined Ergonomics: The taller hood shape improves hand support and allows for a more natural finger wrap, reducing fatigue on long rides.

• Servo Wave Technology: Optimizes the braking stroke for a shorter initial pad contact and deeper, more intuitive modulation.

• 12-Speed Hyperglide+: Engineered to provide smooth, instantaneous shifts even under high pedaling loads while climbing or sprinting.

• Integrated Buttons: Hidden buttons on the top of the hoods allow for controlling ANT+ compatible GPS head units (Garmin/Wahoo) or auxiliary shifting.

Specifications

• Series: Ultegra R8100

• Connectivity: Di2 Wireless (Proprietary), Bluetooth/ANT+ (via EW-EC300)

• Shifter Type: Dual Control Lever (2×12-Speed)

• Brake Compatibility: Hydraulic Disc (Mineral Oil)

• Lever Material: Carbon Fiber Reinforced Plastic (CFRP)

• Battery: CR1632 (Approx. 1.5–2 year life)

Typical Components Included

• Shimano Ultegra ST-R8170-R (Right/Rear Shifter)

• Shimano Ultegra ST-R8170-L (Left/Front Shifter)

• Two CR1632 Batteries (Pre-installed)

• Brake Hose Fixing Bolts and Plugs

• User Manual and Setup Guide