High performance Ultegra Wireless hydraulic Servo Wave disc brake Di2 STI’s give you control, modulation and power with minimal effort in all riding conditions Wireless connectivity to the front and rear derailleurs for effortless trouble free gear shifts With Di2 technology shifting is easy and precise – just a light touch, as soft as a mouse click, is sufficient for the front or rear derailleur to instantaneously select the correct gear Full and semi synchronized shifting programable, Synchro shift compatible meaning a single shifter can control both front and rear shifting which can be fully custom tuned to your riding preferences. Semi synchronized shifting means when a front shift is made the rear mech will automatically correct to the appropriate ratio Simply pressing tactile buttons allows effortless and comfortable shifting even when your hands are cold Drop bar STI with shift buttons located in a near identical place to the positions you’d assume shifting using a mechanical Shimano STI Hydraulic brake lever with Servo Wave provides excellent stopping power with less effort especially from the hood position Hydraulic reservoir tank provides pad to rotor clearance auto-adjust maintaining braking performance during pad wear Finely tuneable reach adjusters for the levers enable custom fitment for all hands Levers use CR1632 batteries which last for approximately 1.5-2 years PRODUCT SPECIFICATIONS MODEL NO ST-R8170 SERIES ULTEGRA R8100 Series Color Series color Average weight 391 (/pair) Shifter type DUAL CONTROL LEVER Remote switch ✔ Brake lever|Brake hose (kit) SM-BH90-JK-SSR Brake lever|Hose joint Straight Brake lever|Brake hose color (kit)|1 Black Brake lever|Recommended brake caliper BR-R8170 Brake lever|Oil SHIMANO Mineral Brake lever|Reach adjust ✔ Brake lever|Clamp band (mm) 23.8-24.2 Brake lever|Funnel bleeding ✔ Brake lever|Free stroke adjust ✔ Brake lever|SERVO WAVE ✔ Di2 connectivity wired|Di2 shifting ✔ Di2 connectivity wireless|Di2 shifting ✔ Firmware update by E-TUBE PROJECT ✔ 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
