Just the same as for Dura-Ace Di 2. Changing gears becomes easier effortless & faster by simply touching the electronic shift buttons. Control at your fingertips. Additional benefits include an automatic trimming front derailleur great accuracy plus easy adjustment & installation. Di 2 continues its great success with Shimano Ultegra. & it makes no difference if these roads are cobbles tarmac or mud. Intuitive Shifting with Less Effort & More Precision
- Anyone who has experienced Shimanos mechanical ergonomic STI levers knows just how much control they have over all components. With Di 2 technology shifting is even easier & more 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. Shimano riders will be used to them immediately since all the buttons are in the same place as on regular levers. The distance between the lever & the handlebar is adjustable. This makes it extremely easy to brake & shift even for riders with smaller hands. Smooth & Easy Shifting Even Under Heavy Load
- The front derailleurs operation is pioneering. Smooth shifting is guaranteed thanks to a microchip communication link with the gear levers. Whats more shifting the rear derailleur automatically trims the front derailleur. This ensures that the chain never rubs. Its rigid construction guarantees swift silent smooth shifting even under the most demanding of conditions. Easy Shifting at a Touch Accurate & Effortless
- The rear derailleur is pre-programmed allowing you to shift gear quickly & accurately in all conditions. The derailleur is immune to rough circumstances & protected from impact damage by its reinforced inner cage. It has a maximum sprocket of 28T for wide-range gearing. Ultegra BR 6700 Brake Calipers
- Exceptionally powerful adjustable & controlled application. Braking is now even more powerful & faster thanks to a modified cable inlet. In conjunction with STI levers these brakes provide the ultimate in stopping power. enhanced compound brake shoes have enhanced braking in wet conditions by 100%. A light touch of the brakes going into a bend or a full-on emergency stop… either is possible thanks to the brakes controlled application. Ultegra CS 6700 Casette Sprockets
- Rapid gear shifting is achievable using components that have been designed to be used with one another. The cassette is an important element in the drivetrain. This is why the sprocket design has been optimized to allow you to get the most out of the Di 2 system. Ultegra CN 6701 Chain
- The forces exerted on a chain are incredibly large yet its role is to provide smooth power transfer. The chain has a unidirectional design to reduce chain suck & improve shifting performance. This chain features perforated plates that help to reduce the weight to 267 grams. Key
Features: Ultegra Di 2 ST 6770 Dual Control Lever lightweight levers for highest comfort & control digital push button shifting – like clicking a mouse ergonomically designed hood shape lever reach adjustment – fits all hand sizes weight: 313 g (pair) Ultegra Di 2 FD 6770 Front Derailleur fast accurate smooth shifting programmed automatic trim – silent shifting weight: 162 g Ultegra Di 2 RD 6770 Rear Derailleur programmed electronic shifting – fast & accurate never drops out of alignment crash saver function inner cage impact protection – cage moves automatically inwards on impact max. rear sprocket: 28T for wide-range gearing weight: 270 g Ultegra BR 6700 Brake Calipers interchangeable brake shoes adjustable braking force weight: 317 g Ultegra CS 6700 Casette Sprockets Combinations: 11-12-13-14-15-17-19-21-23-25 T weight: 209 g (11-25) Ultegra CN 6701 Chain weight: 272 g (116 links) This groupset comes complete with Battery Internal Wiring Loom & EU Charger