NEW Shimano SM-JC40 Di2 External Frame Junction Box 4-Port price_changed_on_2024-07-23 Ultra-light hollow carbon fiber crankarms

Ultra-light hollow carbon fiber crankarms are 29 g lighter than previous generation

Post can be tuned to rider weight through a simple elastomer change

* Tires: 9 (new rear tire)

Cassette: SRAM XG-1290

NEW Shimano SM-JC40 Di2 External Frame Junction Box 4-Port price_changed_on_2024-07-23 Ultra-light hollow carbon fiber crankarmsShimano 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