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Shimano Dura Ace ST-R9170 Di2 Hydraulic 2-Speed Left Shifter/Brake NEW

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Shimano DURA ACE Di2 ST-R9170 2-fold shift/brake lever LEFT

With their slimmer and elegant horns, the Di2 2 x 11-speed STI ST-R9170 levers feature improved ergonomics that not only result in increased comfort, but also improved control.

The hydraulic brakes bring a whole new level of braking control and reliability to the racing bike segment at DURA-ACE level and enable maximum confidence in braking performance even in the most demanding weather conditions. In addition, the new levers contribute to easier and faster shifting thanks to their shortened lever travel. Of course, the grip width can be adjusted for all levers, so that the grip position can be adjusted ergonomically to suit your individual needs. Racers who choose the Di2 switching system also have the option of using the E-TUBE software to switch the multi-shift function on and off for each button individually and to individually set the function assignment to each individual button.

With the R9100 series, SHIMANO presents the latest generation of the flagship road bike group DURA-ACE, the most advanced component group of all time. The new DURA-ACE is the answer to the question of many professionals and ambitious amateurs as to whether and how the current, already immensely high level of performance could be further increased.

At the top of the specifications for the SHIMANO engineers when developing the new DURA-ACE R9100 was to examine every single component, every single part down to the smallest detail and improve it in such a way that the rider's input is optimized and the output of the entire system is maximized. In other words, it was about minimizing the energy loss between the power the driver puts into the system and the overall performance that comes out at the end. Therefore, each individual DURA-ACE R9100 component is designed to work as efficiently as possible with all other components of the system. This shows the core of SHIMANO's philosophy of components developed as a system particularly clearly. The result is SYSTEM SUPREMACY – the superiority of the system over the sum of the individual parts.

Model features:

Better dosage and greater confidence in racing conditions
Hydraulic braking system optimally tuned for racing use
Special brake lever shape, lever travel, contact point, stiffness and special shift buttons
Light weight
Carbon composite grip rubber
More intuitive, faster shifting
Clearer click feel and ergonomic shifter position
Function adaptable to every driving style
Multi-Shift can be turned on or off separately for each switch
Optimal power transmission with a firm grip
Ideal ergonomic and softer grip rubber shape with improved strength
Constantly high braking performance in all weather conditions
Quick and easy bleeding through one-way bleeding
Area of application: racing bike/cyclocross
Group: Dura Ace Di2
Model: ST-R9170
Gearshift: Di2 (only suitable for electronic gearshift!)
Brake: only suitable for hydraulic brakes!
Type: Dual Control (STI)
Cultivation: left
Front switching levels: 2-fold
Optical gear indicator: no
Reach adjustment: Yes
Handlebar diameter: 23.8mm/24.2mm
Brake type: Hydraulic brake system (disc brake)
One-way venting: Yes
Brake fluid: mineral oil
Recommended brake disc: SM-RT900 (140mm/160mm)
Compatible Cable: EW-SD50
Master Unit: No
Firmware Update E-tube Project: Yes
Number of E-Tube connections: 2
material Handle: CFRP
Lever material: carbon, painted