Disc brake set rear Shimano ULTEGRA ST-R8170(R) + BR-R8170(R)

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. 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.

Hydraulic disc brake
Brake fluid: SHIMANO Mineral Oil
Brake hose (Kit): SM-BH90-JK-SSR
Hose joint: Straight
Funnel bleeding (Shimano One Way)

SHIFTER INFORMATION
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 and 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

Weight: 196 g
Firmware update by E-TUBE PROJECT
Remote switch
Clamp band (mm): 23.8-24.2
Reach adjust
Free stroke adjust
SERVO WAVE
DUAL CONTROL LEVER
Battery
Wired Di2 shifting
Wireless Di2 shifting
Port for remote sprinter shifter: Not available
Port for SD300 satellite shifter (pcs): 1
SD300 connector (pcs): Not available
SD300 port (pcs): 1
SD50 connector (pcs): Not available
SD50 port (pcs): 0

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

Weight: 136 g
ICE TECHNOLOGIES pad compatible caliper
Caliper fixing bolt Anti loosen method: Bolt fix pin, snap ring
Caliper fixing bolt tool size: 4 mm
Fixing screw spec for rear mount: 10/15/20/25/30/35 mm mount
Flat mount
Pad mount: Pad axle
Pistons: 2
Includes brake pads: L03A Resin
OPTIONAL compatible brake pads (not included): L04C Metal, K03S Resin