high-end design handed down from Shimano's top-tier drivetrains. Hollowtech 2 construction provides the optimal balance of stiffness, strength, weight, and rotational performance. A gloss black anodized finish provides a refined aesthetic that ...

you literally extend your Dura-Ace or Ultegra Di2 shifting functions by adding additional shift controls to the ends of your aero extension bars. You get the same, effortless, push-button shifting as you ...

yet another bold leap forward in top-level bike racing technology. Time tested by pro riders and engineers, Shimano has added another layer on top of the highest level of components available today. ...

quicker shifting than ever before; changing gears 45% faster than the previous Di2 generation. At 99 grams, this lightweight derailleur is faster uphill and, with a reduced frontal area, it's also more ...

Box for connecting the two derailleurs, battery, and cockpit controls in a Shimano Di2 electronic shifting system. This junction works with all Di2 with e-tube wired system components as long as firmware ...