Hydraulic Disc Brake Dual Control Lever
Dura-Ace ST-R9170
The ST-R9170 Hydraulic Disc Brake levers have two e-Tube ports each and weigh about 160g per lever.
They do not feature the dedicated sprint shifter port, so using the SW-R610 sprint shifters is not possible.
If you really want sprint shifters then the SW-R9150 sprint shifter is the alternative. These shifters are a bit bulkier than the older sprint shifters, unfortunately.
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Just like the ST-9070, ST-R8050, ST-R8070, ST-R9150 and GRX levers, these ST-R9170s have a hidden button on top of the hoods.
I wrote an article on setting up the Di2 shifter hood buttons, so have a look if you haven't set yours up yet.
Specifications
- Model code: ST-R9170
- Series: Dura-Ace R9150
- Weight: 160g (per shifter)
- SD50 ports: 2
- SD50 satellite shifter ports: 0
- Wired shifting: Yes
- Wireless shifting: No
- Reach adjust: Yes
- Brake type: Disc
- Free stroke adjust: Yes
- Servo wave: No
