Shimano Dura-Ace Di2 STI ST-R9170 Shift/Brake Lever 2-/11-Speed

Item number: 51456
Dura-Ace Di2 STI ST-R9170 Shift/Brake Lever 2-/11-Speed - black/2-speed
Dura-Ace Di2 STI ST-R9170 Shift/Brake Lever 2-/11-Speed - black/2-speed
Dura-Ace Di2 STI ST-R9170 Shift/Brake Lever 2-/11-Speed - black/2-speed
Dura-Ace Di2 STI ST-R9170 Shift/Brake Lever 2-/11-Speed - black/11-speed
Dura-Ace Di2 STI ST-R9170 Shift/Brake Lever 2-/11-Speed - black/11-speed
Dura-Ace Di2 STI ST-R9170 Shift/Brake Lever 2-/11-Speed - black/11-speed
Dura-Ace Di2 STI ST-R9170 Shift/Brake Lever 2-/11-Speed - black/11-speed
  • 100 day return period
  • Online since 1998
  • Trusted Shop 4.91 / 5.00

The Dura-Ace Di2 ST-R9170 Shift/Brake Lever by Shimano - slim, compact, reliable

The Shimano Dura-Ace Di2 shift/brake lever ST-R9170 offers you one more option, namely electronic shifting (2-speed or 11-speed) and hydraulic braking in one (Shimano Total Integration Technology). This means that you have the highly reliable deceleration performance of a disc brake at your disposal in all conditions, while at the same time benefiting from the convenience of Di2 Dual Control technology. Despite the integrated hydraulic system, it was possible to keep the grip horn pleasantly slim and compact. Adjustable grip width and pressure point also benefit ergonomics and usability, while Servo Wave Technology ensures optimum conversion of lever travel into braking power. On the other hand, the intuitive gearshifts with their clear click feel should be emphasized, as well as the diverse customisation options. The E-Tube platform can be used to program the shift steps, switch the multi-shift functions on and off and perform firmware updates. The ST-R9170 STI is made almost entirely of carbon and therefore also knows how to convince with its low weight.

Information regarding the return of batteries and electrical equipment:

Information on the return and disposal of batteries and electrical equipment can be found here.


Series: Dura-Ace Di2 R9150
Application: Road
Gearing: 2-speed, 11-speed
Shifting System: electronic
Brake Type: hydraulic

Technical Information:

Brake Lever Material: Carbon
Lever Body Material: carbon (CFRP)
Hood Material: carbon composite
Hose: SM-BH90-JK-SSR (not included)
Actuation: mineral oil
Mount: clamp (closed)
Reach Adjust: bolt
Adjustment Options: reach adjust, contact point


Clamp Diameter: 23.8 - 24.2 mm
Power Cable: EW-SD50 (2 x connection)
Front Derailleur: FD-R9150, FD-R8050, FD-9070, FD-6870, FD-RX815
Cranks: FC-R9100, FC-R9100-P, FC-R8000, FC-R7000, FC-RS510, FC-9000, FC-6800, FC-5800, FC-RS500, FC-U5000-2, FC-RX810-2, FC-RX600-11
Rear Derailleur: RD-R9150, RD-R8050, RD-9070, RD-6870, RD-RX805, RD-RX815, RD-RX817
Cassette: CS-R9100, CS-9000, CS-6800, CS-5800, CS-R8000, CS-HG800-11, CS-R7000, CS-HG700-11, CS-M8000-11, CS-M7000-11, CS-M5100-11
Chain: CN-9000, CN-6800, CN-HG901-11, CN-HG701-11, CN-HG601-11, CN-LG500
Brake Caliper: BR-R9170 (recommended), BR-R9270, BR-R9170, BR-R8170, BR-R8070, BR-R7170, BR-R7070, BR-RS785, BR-RX810, BR-RX400, BR-4770
Additional Brake Lever: BL-RX812


- hydraulic brake system optimally tuned for racing use
- more intuitive, faster shifting: clearer click feeling and ergonomic shift lever position
- function adaptable to every riding style: Multi-Shift can be switched on or off separately for each shifter
- optimal power transmission with firm grip
- ideal ergonomic and softer rubber grip with improved strength
- programmable gearing
- multiple input: hold
- E-Tube project ensures firmware updates
- straight hose connection
- funnel bleeding (with TL-BR002)
- CFRP shifter and master cylinder, painted brake lever


STI Dual Control
Shimano Total Integration (STI) means the combination of braking and shifting functions in one lever, which increases safety when riding. By refining the technology, it became possible to make shifting so smooth at the front and rear that they can be triggered with just one finger. Shimano calls such levers Dual Control Levers (DCL).

Digital Integrated Intelligence (Di2)
Di2 systems are the electronic shifting systems from Shimano. They are based on the SEIS, the Shimano Electronic Intelligent System, which takes over the index shifting function from the mechanical components, only via power cables or radio signals and not via a Bowden cable. Shifting is done by simply pressing a button. This has the advantage that no great effort is required, your concentration on the ride is not disturbed and operation is easy even with cold hands. In addition, the electronic gear changes are very fast and highly precise. There is also no risk of a defective circuit due to dirty cables or other problems. You can adjust individual settings via the E-Tube Project, such as adjusting the shifting speed, the number of shifting operations per button press or the Synchro or Semi-Synchro shifting function. Shimano offers an app for this purpose. Gear maintenance and firmware updates are also done via E-Tube, with the bike connected to a PC running the appropriate E-Tube software for more extensive workshop work.


Mount: left
Manufacturer Number: I-STR9170L

Mount: right
Manufacturer Number: I-STR9170R


- 1 x Shimano Dura-Ace Di2 ST-R9170 Shift-/-Brake Lever
- 1 x Shimano TL-EW02 plug tool (11-speed version only)


  • black/2-speed: 160 g
  • black/11-speed: 160 g


  • black/2-speed, out of stock
  • black/11-speed, out of stock

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