Ultegra offers riders incredibly fast and accurate Di2 or mechanical shifting, and hydraulic or rim braking with near-identically shaped, perfectly ergonomical levers and hoods.
The new Di2 lever can operate with the recently released full or semi Synchronized Shifting function (with the BT-BN110 battery), giving riders the option to make automatic shifts from the front (full) or rear (semi) derailleurs. This means that you could set, for example, both left shifters to move up through the drivetrain and both right shifters to move down through the drivetrain. As well as this the shifters have more defined click feeling to offer quick and precise shifting with gloves.
Following the design of the 'secret' Dura-Ace Di2 shifter buttons, the new Ultegra ST-R8070 hydraulic Di2 and ST-R8050 rim brake Di2 levers also include the top-of-the-hoods buttons for remote shifting, which can be programmed to shift gear or to control ancillary devices such as compatible computers or lights.
All shift levers or buttons can also operate multi-shift which, like the top button and Synchronized Shift features, are customisable in the E-TUBE app for phones, tablets or PCs. The app not only allows you to customize functions and operations as you please, but also allows you to keep all units up-to-date with the latest firmware and run error checks to pinpoint and solve abnormalities.
The ST-R8070 hydraulic levers step up from the previous non-series R785 levers with greater reach and free stroke adjustments. The new hydraulic levers (ST-R8070 and ST-R8020) weigh in at 360g and 550g respectively, 65g and 112g lighter than their rim brake counterparts (ST-R8050, 295g, and ST-R8000, 438g).
The front derailleur (FD) is designed to handle quick and smooth shifting under high pedaling torque. Combining with the re-designed crankset, the FD has been redesigned to fit a wider gear pitch without sacrificing shifting.
The Di2 (RD-8050) or mechanical (RD-R8000) rear derailleur (RD) adopts the Dura-Ace low-profile Shimano Shadow RD design to sit fully under the cassette, tucked away from potential damage. The RD comes in a short cage (SS) design to cover 11-25T to 11-30T and a longer cage (GS) design to cover 11-28T to 11-34T. Both front and rear Di2 derailleurs communicate with each other to operate full or semi Synchronized Shifting mode, allowing the rider to maintain concentration on the road or the race ahead.
The mechanical shifting levers are available as hydraulic (ST-R8020) or rim brake designs (ST-R8000) featuring Polymer-coated cables for an incredibly light shifting operation.
The design does away with in-line barrel cable tension and instead offers an allen key adjustment for easy, precise and accurate cable tension settings.