Ultegra R8170 Hydraulic Disc Brake Set (J‑Kit)

The Shimano Ultegra R8170 Hydraulic Disc Brake Set (J‑Kit) delivers powerful, consistent braking with the clean wireless Di2 interface of Shimano’s latest 12‑speed road platform. Designed for modern frames with internal hose routing, the J‑Kit Direct system arrives pre‑bled to simplify installation. SERVO‑WAVE technology enhances modulation and control, while the updated BR‑R8170 caliper provides wider pad clearance for quieter, more reliable performance in all conditions.

Features

• Wireless Di2 shifting interface for a clean, modern cockpit

• SERVO‑WAVE lever technology for improved modulation and braking control

• J‑Kit Direct configuration for easier internal‑routing installation

• Wider pad clearance to reduce brake noise

• Ergonomic lever shape with raised hood peaks for secure hand placement

• Light, smooth lever action with expanded control area

• Flat‑mount 2‑piston hydraulic caliper

• Includes L05A‑RF resin pads with cooling fins

• Mineral oil hydraulic system

• Hose length varies by side (Front/Rear)

• Compatible with Shimano 12‑speed road Di2 systems

• Rotor sold separately

• Color: Black

• Aluminum construction