NEW Shimano SM-JC40 Di2 External Frame Junction Box 4-Port variant-size-41-eu-mens Weight (grams): 238

Weight (grams): 238

The inflator head is compatible with both Presta and Schrader valves and the included velcro strap attaches to seatposts

Includes stiff aluminum faceplate and stainless steel hardware with TORX heads on all bolts for precision torque readings and ease of adjustment

seat stays

Brakes: Shimano MT420 4-Piston Hydraulic Disc

NEW Shimano SM-JC40 Di2 External Frame Junction Box 4-Port variant-size-41-eu-mens Weight (grams): 238Shimano 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 Mounts underneath the bottom bracket