Shimano Ultegra Di2 ST-R8170 Right Lever w/BR-R8170 12-speed Disc Brake Front

Shimano Ultegra Di2 ST-R8170 & BR-R8170 Disc Brake – The Science of Speed

Experience unparalleled speed, control, and precision with the redesigned Shimano Ultegra Di2 ST-R8170 brake levers paired with the BR-R8170 hydraulic disc brake caliper. With new ergonomics, proven SERVO WAVE technology, and wireless electronic shifting, this 12-speed dual-control system delivers exceptional performance for competitive racing and high-speed riding.

Key Features:

• Dual-control STI levers with improved aerodynamics and raised, rounded brake grips for superior comfort.
• Enhanced brake modulation with the BR-R8170 caliper featuring flat-mount design and L03A resin disc pads with fin for quiet, efficient braking.
• Wireless Di2 system for the fastest, most reliable gear changes, boasting low interference and high energy efficiency (up to 1.7 years battery life).
• Customizable shifting via the E-TUBE app, allowing adjustments in shift speed, mode selection, and programmable button functions.
• Optimized hydraulic braking with a 2-piston caliper that ensures excellent heat dissipation and easy maintenance.
• Constructed from premium materials including CFRP, painted carbon, and aluminium for outstanding durability and performance.

Advanced Technologies:

• SEIS: Shimano Electronic Intelligent Shift system for effortless, precise gear changes in all conditions.
• E-Tube: Plug & play connectivity for firmware updates and enhanced system integration.

Specifications & Compatibility:

• 12-speed Shimano Ultegra Di2 groupset
• Hydraulic disc brake with flat-mount configuration
• Compatible with RT-MT800 rotors (recommended 140mm/160mm)
• Complete set includes brake hose (SM-BH90-JK-SSR 1700mm, shortable), mounting hardware, and tube joint kit

Discover the science of speed with Shimano's revolutionary Ultegra Di2 ST-R8170 and BR-R8170 Disc Brake system – engineered for precision, speed, and the ultimate riding experience.