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Shimano Ultegra Di2 ST-R8170/BR-R8170 shift-/brake inheit wheel

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Only online and Click & Collect
Currently available via the store
Display mfg part numbers
rear right 12 speed 52810396 306.64€
MPN SH000017798
front left duplex 52810395 306.64€
MPN SH000017786
Please select a variant.

Road cycling has never been so much fun

The reason for this are the new ULTEGRA ST-R8170 Dual Control shift / brake levers with their optimized ergonomics, the even more precise control of the brakes and the wireless, electronic shift function. Thanks to these three improvements, racing cyclists can now concentrate fully on the next sprint, the next descent or the next joke from a rider.

The new ULTEGRA ST-R8170 brake lever offers improved controllability and control on every ride thanks to the proven SERVOWAVE technology from Shimano. The brand new Di2 platform is used by DURA-ACE and ULTEGRA, where it ensures the world's fastest and most reliable, wireless switching processes. Time in the saddle is valuable to every rider and thanks to Shimano it gets even better.


  • Tidy cockpit: The wireless connection improves aerodynamics and makes maintenance easier
  • Unique ergonomics based on professional feedback
  • Raised horns improve ergonomics and give the hands more grip
  • Optimized brake control: Lighter, easy-to-use lever and improved controllability thanks to the extended brake control range
  • Compatible with wired and wireless connection
  • Available for additional satellite switches
  • High energy efficiency: Battery life: 1.5 to 2 years with easily replaceable CR1632 batteries in the shift / brake levers


specification SH000017786 SH000017798
Area of application Road Road
Type Shift / brake lever including brake caliper, hydraulic Shift / brake lever including brake caliper, hydraulic
Suitable for (mounting lever / brake caliper) Left, front wheel Right, rear wheel
Material shift / brake lever Carbon fiber reinforced plastic Carbon fiber reinforced plastic
Reach adjustment Yes Yes
Clamp 23.8 - 24.2 mm 23.8 - 24.2 mm
Housing material Carbon fiber reinforced plastic Carbon fiber reinforced plastic
Drive / switching stages 2- / 12-fold, individually programmable 2- / 12-fold, individually programmable
Circuit type Electronic, semi-wireless Electronic, semi-wireless
Battery / rechargeable battery CR1632 CR1632
Compatible with Shimano Di2, 12-speed Shimano Di2, 12-speed
Material brake caliper aluminum aluminum
Assembly of the brake caliper Flatmount Flatmount
Number of brake pistons 2 2
Brake piston material Resin Resin
Brake pad K03S resin, with cooling fins K03S resin, with cooling fins
Brake line Shimano SM-BH90-JK-SSR Shimano SM-BH90-JK-SSR
Cable length 1000 mm 1700 mm
Line connection Just Just
Brake fluid / medium mineral oil mineral oil
Recommended brake discs Shimano RT-MT800 Shimano RT-MT800
weight approx. 185 g approx. 206 g

Technologies used

In this chapter we explain the technologies that the manufacturer uses for this product.

The SERVOWAVE brake lever absorbs a lot of braking distance at the beginning of its movement, so that the pads can be guided to the brake disc with little lever travel. After the brake lining is applied, the force transmission factor increases rapidly. The greater part of the lever travel is still available to increase the braking force and to dose it more precisely.

Reach Adjust
The brake lever is equipped with a reach adjustment. This means that the handle adapts to the size of the driver's hand or to his driving style or personal preferences.

DCL - Dual Lever Control
DCL stands for Dual Lever Control (DUAL Control Lever). It has braking and switching functions and is easy to operate. The improved ergonomics are probably even more important for the high standard than additional translations. The technology of the new gear levers brings the stability of Shimano's MTB technology and works so precisely and smoothly that it is possible to shift front and rear with just one finger. This is really a highlight of Shimano Total Integration. To understand that, you just have to experience it for yourself.
The dual control shift / brake levers from DURA-ACE, ULTEGRA and 105 have been optimized and now have, for example, a weight-reduced joint on the inside of the shift mechanism and integration of the shift cable for easier steering. The extremely compact and high-precision manufactured individual parts result in an unmatched switching speed when combined.

scope of delivery

  • 1 x Shimano Ultegra Di2 ST-R8170 / BR-R8170 shift / brake unit for front or rear wheel (see item description for details)
  • 1 x brake line including connection kit
  • 1 x fastening material
Shimano Ultegra Di2 ST-R8170/BR-R8170 shift-/brake inheit rear wheel   right  12 speed
Shimano Ultegra Di2 ST-R8170/BR-R8170 shift-/brake inheit front wheel   left  duplex

Über die Marke Shimano

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