Shimano SM-JC40 Di2 External Frame Junction Box 4-Port Cassette & Freewheel Tools UPC: 072774031108

UPC: 072774031108

This one piece hollow crank arm is a high end upgrade option for road

Original Cannondale Di2 battery mounting hardware for SystemSix aero seatposts

Features a larger 13-tooth pulley

Shimano SM-JC40 Di2 External Frame Junction Box 4-Port Cassette & Freewheel Tools UPC: 072774031108Shimano Di2 Frame Junction Box Frame Junction Box connects via SD50 E tube wires to four different points: front derailleur, rear derailleur, cockpit junction box and battery mount All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions Use Di2 system checker to update component firmware from http: e tubeproject. shimano. com Product Specifics Today's Stock