The Shimano Ultegra R8050 Di2 with Di2 technology shifting is easy and precise - just a light touch, as soft as a mouse click, is sufficient for the front or rear derailleur to instantaneously select the correct gear. The removal of traditional mechanical cables in favour of electrical wires eliminates poor shifting caused by contaminates, corrosion and stretching, and also provides effortless gear shifts. Full and semi synchronized shifting programmable, Synchro shift compatible meaning a single shifter can control both front and rear shifting which can be fully custom tuned to your riding preferences. Semi synchronized shifting means when a front shift is made the rear mech will automatically correct to the appropriate ratio Simply pressing tactile buttons allows effortless and comfortable shifting even when your hands are cold. Drop bar STI with shift buttons located in a near identical place to the positions you\\\'d assume shifting using a mechanical Shimano STI Ulterga R8050 11 Speed Di2 Shifters for caliper brakes. Key FeaturesProgrammable function of top button remote switch for third party cycle computers Brake lever pivot is positioned to be used with super SLR brake callipers, increase power providing excellent ergonomics when riding on the hoods Finely tuneable reach adjusters for the levers enable custom fitment for all hands Levers are supplied without electrical cables, as these need to be ordered separately to suit For use with E-tube electric cables Comes complete with SLR brake cable set