SHIMANO ULTEGRA Di2 6770
Shimano Ultegra 6770 series with Di2 technology consists of Dual Control Levers, electronically operated front and rear derailleurs, a battery and electric cables. For the remaining components, like HOLLOWTECH II crankset, brake calipers, cassette sprockets and chain the standard mechanical components of the Ultegra 6700 can be used.
The electric cables include only two core wires (Dura-Ace Di2 has four) and the connectors are smaller too with a diameter of 5.1mm (-3.7mm compared to Dura-Ace Di2). Easy plug and play system to connect the cables, which will be available in different lengths to accommodate most frame dimensions. For diagnosis and changing the shifting order Di2 can be connected with PC easily.
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. Ultegra 6770 products will exclusively become available in the new glossy grey colour and are not compatible with Dura-Ace Di2.
The group set consist of
ST-6770 : Dual Control Levers
RD-6770-SS : Rear Derailleur
FD-6770-F : Front Derailleur (clamp band optional)
SM-EW67-A-E : Electric Cable Junction
SM-JC40 : Junction for external wire routing (select size, Internal optional)
SM-BCC13 Power Cable for SM-BCR1 / Battery Charger Lead (Plug type optional)
SM-BCR1 : Battery Charger
SM-BTR1 : Battery