Shimano Di2 SM-JC40. only 4 Ports
04-04-22, 06:18 AM
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That is a B junction, which only needs 4 ports. Front derailleur, rear derailleur, battery, and cable from a 5 port A junction where your levers and tri shifters connect.
Last edited by Bald Paul; 04-04-22 at 06:23 AM.
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04-10-22, 01:06 PM
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The 5-port A junction Bald Paul mentions is the SM-EW90-B. The SM-EW90-A also exists, but only has three ports.
If you really want more ports anywhere, you can also install any number of additional B junctions: SM-JC41 (or SM-JC40). These are just "dumb" splitters, and you can have as many of them as you like. You can only have one junction A.
If you really want more ports anywhere, you can also install any number of additional B junctions: SM-JC41 (or SM-JC40). These are just "dumb" splitters, and you can have as many of them as you like. You can only have one junction A.
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