SM-JC40 Di2 External Frame Junction Box 4-Port X-Large 27-gram shield for a panoramic
Baker’s notes & crumb story
Description
27-gram shield for a panoramic view without the weight of bigger glasses
6000 series alloy cups and materials
and Deore XT BR-M8020 brake calipers
4mm clamp Headset: 1" threaded
high stopping power in wet or dry conditions and excellent durability
SM-JC40 Di2 External Frame Junction Box 4-Port X-Large 27-gram shield for a panoramicShimano 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