Shimano Ultegra Di2 11v. The Ultegra Di2 electronic shifting series is "pro-tested" because it comes directly from our Dura Ace group. It is synonymous with cutting edge technology, proven in profersionales careers, technologies used in the new series 6870 Ultegra 11-speed, brakes new design, the new treatment chain etc. The electronic shift lets you concentrate on your performance.

components:

* SMJC41L2A Di2 wiring kit: interior.

* Internal Battery SMBTR2A Di2 groups

* SMBCR2 Internal Battery charger with cable.

* FD6870 Di2 derailleur

* Change Di2 RD6870

* Controls ST6870 Di2