The Shimano Di2 SM-EW90-A Junction Box is a three-port hub designed for cockpit-mounted electronic shifting systems.
This compact junction allows seamless integration of multiple Di2 components in the handlebar area, distributing power and signals efficiently across your drivetrain controls. Perfect for riders building custom cockpit setups, the SM-EW90-A supports clean cable routing and reliable connections between your shifters, front derailleur, and rear derailleur. Its weather-sealed design ensures durability in all conditions, while the intuitive port layout simplifies installation and maintenance. Compatible with Shimano's full Di2 ecosystem, this junction box is essential for modern electronic groupset configurations where space and organisation matter.
Specification
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Model: SM-EW90-A
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Type: External type
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Position: Under stem
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E-tube port (pcs): 3
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E-tube connector (pcs): 0
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Master unit: No
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Connector for remote sprinter shifter (QTY): 0
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Port for remote sprinter shifter (QTY): 0
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Charging port (QTY): 1
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Compatible system: E-Tube
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Compatible electric wire: EW-SD50
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Wire routing: internal/external
Compatibility
- Dura Ace Di2 9070
- Dura Ace Di2 R9150
- Ultegra Di2 R8050
- Ultegra Di2 6770
- Ultegra Di2 6870
- XTR Di2 M9050
- XT Di2 M8050
Contents
- 1 x Shimano Di2 SM-EW90-A Junction 3 Ports
- 1 x Mounting material
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.
Weights are based off pre-production products at time of publication. Weights may vary in final production.
