Ultegra Di 2 6870 Upgrade Kit Upgrade your bike to Di 2 with this comprehensive kit. Everything you need to convert a mechanical 6800 groupset to 6870 Di 2. Eliminate cable-stretch, & never suffer from badly-indexed gears again. Live the electric dream! This kit comprises: STI Levers Ultegra Di 2 6870 11 Spd ex cables Ultegra Di 2 6870 11 Sp Rear Gear SS (Short) Ultegra Di 2 6870 11 Spd Front Gear Braze-on Di 2 Junction-A SM-EW90-A 3 Port (or 5-port, to support climbing/sprint-shifters) Di 2 Internal Fit Battery 7.4V Di 2 Battery Charger USB (Universal Serial Bus) Connection (SM-BCR2) Di 2 Internal Cableset Di 2 EWSD-50 350mm Electric Wires (pair) Please note: This kit is only suitable for internally-routed installations, & you may require additional components to fit this to your bike.