- 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 |





















