Shimano Ultegra lets the high end technology available to a much wider group of road racers and enthusiasts. Di2 (Digital Integrated Intelligence) makes changing gears becomes easier, effortless and faster by simply touching the shift buttons. Control at the top of your fingers.
Shimano Ultegra 6770 series with Di2 technology electronically operated front derailleurs, a battery and electric cables. The electric cables with the connectors are smaller too with a diameter of 5.1mm. Easy plug and play system to connect the cables, which will be available in different lengths to accommodate most frame dimensions. Connection with PC for diagnosis and changing the shifting order. The SEIS (Shimano Electronic Intelligence System) is based on the Shimano Index System (SIS) that has proved its superior gear changing characteristics over the years. The big difference is that in this case, the shifting action is provided for by electronics instead of mechanics.
Shifting is guaranteed thanks to a microchip communication link with the gear levers. What's 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.
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