Shimano Connexion Interne Boitier DI2 SM-JC41 4 Ports Black

Internal connection box Shimano DI2 ISMJC41 - 4 Ports This connection box is compatible with Shimano Ultegra Di2 and Dura-Ace Di2 electric groupsets. It will be used to connect the transmission handles, the battery and the rest of the parts of the group. The fixing of this box is done internally in the frame, often at the level of the bottom bracket. With its 4 ports , it is suitable for a road bike.