
Shimano Ultegra R8170 Di2 Hydraulic Disc Brake Kit Left Flat Mount
Shimano Ultegra R8170 Di2 Hydraulic Disc Brake Kit Left Flat Mount
Stage 21 Bikes
23582 Moulton Parkway
#111
Laguna Woods CA 92637
United States
Choose options
The Shimano Ultegra R8170 Di2 Hydraulic Disc Brake Kit combines wireless Di2 shifting with powerful, highly controlled hydraulic braking. Featuring the ST-R8170 brake/shift lever and BR-R8170 2-piston disc brake caliper, this system delivers refined ergonomics, quiet braking, and enhanced modulation for modern road bikes.
Key Features
-
Wireless Di2 shifting for a clean cockpit and simplified setup
-
SERVO-WAVE technology for enhanced modulation and braking control
-
2-piston hydraulic disc brake caliper with improved initial bite
-
Wider pad clearance for reduced brake noise
-
Maintenance-friendly bleeding process
-
Refined ergonomics with raised hood peaks
-
Light, smooth lever action for precise control
Specifications
-
Brake Lever Use: Left
-
Brake Lever Actuation: Hydraulic
-
Brake Caliper Mount: Flat Mount
-
Hydraulic Hose Length: 1000 mm
-
Hydraulic Fluid: Shimano Mineral Oil
-
Pad Compound: Organic
-
Drivetrain Speeds: 12-speed
-
Double / Triple: Double
-
Adjustable Reach: Yes
-
Color: Black
-
Defined Color: Black
-
Rotor Included: No
Compatibility
-
Shimano Road Di2 front and rear derailleurs
-
Shimano 12-speed road Di2 drivetrains
-
Flat-mount road frames and forks
-
Shimano hydraulic disc brake systems using mineral oil
In the Box
-
Shimano ST-R8170 Di2 hydraulic brake/shift lever (Left)
-
Shimano BR-R8170 hydraulic disc brake caliper
-
Pre-installed hydraulic hose (1000 mm)


