Shimano broke the mold with their Dura-Ace Di2 group. Effortless shifting, instant engagement, unparalleled performance. Well, now you can get electronic shifting without shelling out all that dough. The Ultegra Di2 group is a more affordable version of the Dura-Ace Di2 group, so you can enjoy many of the benefits, without the high price tag. These levers have a sleek, mean look to them that will polish off any serious road rig. They're also slimmer and lighter than their mechanical counterparts, and they've got more adjustability to let you customize the feel of your setup.
Electronic touch pads transmit shift data to the derailleurs rapidly for up to 30% faster shifting than with cable systems
Lack of cables also means no cable stretch to screw up your drivetrain adjustments over time
Ergonomically shaped hoods and bracket design keep your hands comfortable even on long rides
New pivot location for the brake lever improves modulation and gives you a more comfortable grip
Reach-adjust feature lets you tune these levers for smaller hands
Must be used in conjunction with the Shimano Ultegra Di2 FD-6770 Braze-On Front Derailleur, Shimano Ultegra Di2 RD-6770 Rear Derailleur, Shimano Ultegra Di2 Battery Pack and Wire Kits