Description Shimano E-Tube wires, compatible with Di2 groups (except DA 7970) and STePS bikes. Compatible with both internal or external routing 4 to 6 electric wires are required to complete the system, read below Junction B to FD/JCT B to battery: 2 wires needed; suggested lengths: -01/300mm, -02/350mm or -03/400mm JCT B to RD: 1 wire needed; suggested length: 600mm JCT B to handlebar area with SM-EW90 Junction A: 1 wire needed; suggested length: 1000mm Alternative: JCT B to handlebar area with internal EW-RS910 Jct A: 1 wire needed from Jct B to EW-JC200 2-port junction or EW-WU111 wireless module, suggested length 1000mm, plus 1 wire from EW-JC200/EW-WU111 to EW-RS910, suggested length from 400 to 600mm SM-EW90 JCT A to shifters: 2 wires (1 per shifter), lengths from 300mm to 400mm, or 1 y-split EW-JC130 cable Alternative: EW-RS910 JCT A to shifters: 1 y-split EW-JC130 cable
