In the Di2 Ultegra shifting systems from SHIMANO, wireless technology is used wherever it seems appropriate for everyday riding and for ultimate sporting performance. The separation of the physical connection between the shift levers and rear derailleur allows for a tidy cockpit and also simplifies the assembly process. At the same time, the connection of the shifting components with an internal battery ensures absolute reliability thanks to the stable power supply.
Great speed means great responsibility. That's why, faced with the task of making the new ULTEGRA groupset even faster, Shimano decided to take a holistic and 100% performance-focused approach. Shimano's new 12-speed road groupset delivers unparalleled control and comfort anytime, anywhere - whether you're competing in an amateur race, chasing your personal best, or out for a social ride. That is "Science of Speed". And it's what sets SHIMANO apart from the rest.
The redesigned Shimano Ultegra Di2 ST-R8170 brake levers with BR-R8170 caliper feature new ergonomics and even more precise brake modulation thanks to SHIMANO's proven SERVO WAVE technology. Wireless electronic shifting provides even more control. The hydraulic 2-piston brake caliper BR-R8170 for with Flat-Mount and L03A Resin disc pads with fin. The completely redesigned ULTEGRA BR-R8170 brings new levels of control, optimised modulation and unmatched braking power to the road bike world. The new design minimises brake friction. In addition, despite its compact size, the new system is quieter and easier to maintain than ever before.
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