Shimano Dura-Ace/Ultegra Di2 SM-JC41 Internal Wire Junction Box 11.6115.530.060 you have choices tailored to

you have choices tailored to your needs

Designed to provide you with a better sports’ bicycle experience the PRO Bottom Bracket Remover Hollowtech II was developed for the removal of SHIMANO cartridge bottom brackets

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A 19-liter open pannier in rigid plastic

They enable you to give your bike the commands to do what you want

Shimano Dura-Ace/Ultegra Di2 SM-JC41 Internal Wire Junction Box 11.6115.530.060 you have choices tailored toThis is the Shimano Ultegra Di2 Internal Junction Box. This box is referred to as the junction box "B" on a Di2 build. The SM JC41 is for use with internal wiring setups and is the main centre of e tube Di2 systems.. 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