Introducing the Shimano Ultegra R8050 Di2 Groupset - 52/36 11/28, the perfect package to get your bike running like a dream, with smooth shifting and top notch durable Ultegra components. Including all the internal routing to complete your bike, this is your go too package.Groupset:Gear Shifters - ST-R8050 Ultegra Di2 STI for drop bar without E-tube wires. A soft light tough is all you need instantaneously select the correct gear. Full and semi synchronized shifting programable, 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. Drop bar STI with shift buttons located in a near identical place to the positions you'd assume shifting using a mechanical Shimano STI. Programmable function of top button remote switch for third party cycle computers.Deralleurs – At the rear is the RD-R8050 Ultegra Di2 11-speed rear derailleur E-tube. Low profile Shadow design construction reduces risk of damage in a crash, programmed automatic motion at the touch of a switch makes this derailleur quick, smooth and effortless to shift. Removal of traditional mechanical cables in favour of electrical wires, eliminating poor shifting. At the front is the FD-R8050 Ultegra Di2 11-speed front derailleur E-tube. Featuring full and semi synchronized shifting programable, 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. Chainset - FC-R8000 Ultegra 11-speed double chainset, 52 / 36T. The HollowTech II 11-speed Ultegra chainset offers an ideal balance of light weight and stiffness, making it the perfect choice for both enthusiast and competitive riders. The outer chainring gives vast improvements in rigidity by virtually removing outer chainring flex and hugely improves shift performance, even under high load. Industry leading HollowTech II cold forged 4 arm hollow cranks have been evolved for maximum rigidity while reducing weight. Cassette - CS-R8000 Ultegra 11-speed cassette 11 - 28T. Lightweight 11-speed HG-EV cassette with rigid alloy sprocket carrier for reduced weight and better shifting performance, even under the most demanding gear changes. Hyperglide EV sprockets have been designed to reduce weight with improve teeth shaping providing accurate shifting and reduced wear. Brake Callipers - BR-R8000 Ultegra brake calliper at the front and at the rear, features Dual-pivot calliper brake with super SLR-EV design for quick linear response, increased rigidity and improved braking power.