Shimano Brake Lever Set Combination
Featuring the ST-R8170 Right Brake/Shifter lever, and the BR-8170 Brake Caliper
ST-8170 Shifter
Road riding has never been this much fun. That's because the redesigned ULTEGRA ST-R8170 DUAL CONTROL LEVERS have all-new ergonomics, even more precise brake modulation, and wireless electronic shifting. This trifecta lets you focus on the next sprint, the next descent, or the next joke from your riding partner.
Shimano's new ULTEGRA ST-R8170 brake levers bring enhanced modulation and control to every ride by employing Shimano's proven SERVO WAVE technology. The all-new Di2 platform, used on both DURA-ACE and ULTEGRA, untethers the shifters while delivering our fastest, most reliable wireless shifting. Your time on the bike is precious, let Shimano make it even better.
Lever Features

Clean Cockpit: Wireless connection enhances the aerodynamic effect and easy maintenance
Unparalleled ergonomics engineering refined with pros' feedback
Raised hood peak improves ergonomics
Optimized brake control
Lighter, smoother lever action
Enhanced modulation thanks to an expanded braking control area
Compatible with wired and wireless connection
Available to additional satellite shifters
High electronic energy efficiency
1.5 to 2 years of battery life with easy-to-change CR1632 shifter batteries

BR-8170 Brake Caliper
To the delight of riders and mechanics alike, the new ULTEGRA BR-R8170 caliper delivers enhanced modulation, a quieter brake system, and an easier than ever bleed process.
The ULTEGRA R8170 disc brake caliper brings a new level of control to the road cycling world with enhanced modulation and a quicker initial braking point. Despite its smaller construction, the system is quieter than ever and easier to maintain.
Brake Features

10% wider pad clearance decreases brake noise
Maintenance-friendly bleeding process

Technical Specifications - Lever

MODEL NO: ST-R8170-R
Speeds: 12
SERIES: ULTEGRA R8100 Series
Average weight: 391 (/pair)
Shifter type: Dual Control Lever
Remote switch: Yes
Brake lever Brake hose (kit): SM-BH90-JK-SSR
Brake lever Hose joint: Straight
Brake lever Recommended brake caliper: BR-R8170
Brake lever Oil: SHIMANO Mineral
Brake lever Reach adjust: Yes
Brake lever Clamp band (mm): 23.8-24.2
Brake lever Funnel bleeding: Yes
Brake lever Free stroke adjust: Yes
Brake lever|SERVO WAVE: Yes
Di2 connectivity wired|Di2 shifting: Yes
Di2 connectivity wireless|Di2 shifting : Yes
Firmware update by E-TUBE PROJECT: Yes
SD50 port (pcs): 0
SD300 port (pcs): 1
SD50 connector (pcs): 0
SD300 connector (pcs): 0
Port for SD50 remote sprinter shifter (pcs): 0
Port for SD300 satellite shifter (pcs): 1
Battery: CR1632

Technical Specifications - Brake

MODEL NO: BR-R8170
SERIES: ULTEGRA R8100 Series
Color: Series color
Average weight: 123
Brake type: Hydraulic disc brake
Brake hose (kit): SM-BH90-JK-SSR
Hose joint: Straight
Brake hose color (kit)|1: Black
J-Kit spec (for OEM): Yes
ICE TECHNOLOGIES pad compatible caliper: Yes
Pad|Standard 1: K05S-RX Resin (w/o fin)
Pad|Standard 2: L05A-RF Resin (w/ fin)
Pad|Option 1: L04C-MF Metal (w/ fin)
Fixing screw spec for rear mount|10 mm mount: Yes
Fixing screw spec for rear mount|15 mm mount: Yes
Fixing screw spec for rear mount|20 mm mount: Yes
Fixing screw spec for rear mount|25 mm mount: Yes
Fixing screw spec for rear mount|30 mm mount: Yes
Fixing screw spec for rear mount|35 mm mount: Yes
Recommended brake lever: ST-R8170
Recommended disc brake rotor: RT-MT800 RT-CL800
Oil: SHIMANO mineral
ONE WAY BLEEDING: Yes
Mount type: Flat mount
Piston: 2
Caliper fixing screw|Tool size: 4 mm
Caliper fixing screw|Anti loosen method: Screw fix pin+Snap ring
Pad mount: Pad axle