Shimano Ultegra ST-R8170 Full Disc Rear Brake Hydraulic 12v 1700mm J-Kit Version (without Disc)

The redesigned Ultegra ST-R8170 Dual Control levers feature all-new ergonomics, even more precise brake modulation and wireless electronic shifting. These features allow you to focus on the next sprint, the next descent, or the next joke from your partner.

Shimano Ultegra ST-R8170 brake levers bring enhanced modulation and control to every ride using Shimano’s proven Servo Wave technology. The all Di2 platform, used on both Dura-Ace and Ultegra, allows for clearer control, while offering faster and more reliable wireless shifting.

The Ultegra BR-R8170 caliper offers improved modulation, a quieter braking system and an easier bleeding process than ever before. Despite its smaller size, the system is quieter than ever and easier to maintain.

J-Kit (Easy Hose Joint System)

On brake systems equipped with a J-Kit brake line fitting, the brake lever has an integrated pinch seal (olive), making it significantly easier to install and remove the entire brake line.

Product Highlights

• Version: DI2 / hydraulic braking
• Smoother and more flexible lever operation
• Improved modulation with extended brake control area
• Streamlined cockpit: wireless connection improves aerodynamics and facilitates maintenance
• 10% more pad spacing to reduce braking noise
• More accessible bleeding process for maintenance.

Details

• Group: Ultegra Di2 R8150
• Tube length: 1700 mm
• Compatible mounting: Flat Mount
• Shimano mineral oil required
• Pads included: L03A Resin with cooling fins
• Recommended discs: RT-MT800
• Part Number: IR8170DRRDSC170E

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