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and tubeless compatibility lets you fine-tune pressure for whatever terrain you are riding
enabling smooth power transfer even when shifting under load on technical climbs
Run with sealant for the most reliable setup
Enhanced chain retention is achieved through an extended inner plate design that firmly holds cassette and chainring teeth
Shimano EW90-A Di2 Cockpit Junction Box 3-Port Grips and tubeless compatibility lets youWhat Is the Shimano EW90 A Di2 Junction Box For? The Shimano EW90 A is a 3 port Di2 cockpit junction box for older generation Di2 systems including Dura Ace 9070 and Ultegra 6870, mounting at the stem or handlebar to serve as the central wiring hub connecting derailleurs and battery via EW SD50 E Tube wires. The mode button built into the EW90 A allows Di2 settings adjustment and component syncing without a computer, and the display port enables
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