Signin to Your Account
Questions? Call our tri Specialists! 1-800-445-4790
COVID-19 Response
Garmin Rally Pedal Mail-In Rebate — Learn More
Shimano Di2 SM-EW90-B Junction-A TT/TRI 5 Port Shimano Dura-Ace Di2 SM-EW90-B 5-Port Front Junction A
Click to zoom

Di2 SM-EW90-B Junction-A TT/TRI 5 Port

Mfg PartNum:
Out of Stock
Ships Free!
Earn $12.49 in Podium Club credit. Click to Learn More.
This size is not eligible for Podium points
Please Confirm Size
Qualifies for Free Shipping!

The Dura-Ace Di2 SM-EW90-B Junction connects the E-Tube wires from two pairs of electronic shifters to the rest of the 9070-series Di2 components. Unlike the standard Front Junction Box (SM-EW90-A), this model allows riders to run bar-end units or "sprinter" switches in addition to the standard STI units. The Front Junction Box also contains the battery indicator unit which can be engaged by the pads on shift controls.

An LED indicator at the junction will display green if the battery is over 50% charged, red if under 50% charged, and flashing red if the battery is almost drained. The indicator mounts to the brake cable housing just below the stem and handlebar junction via an included rubber strap.

The SM-EW90-B Junction features a five port E-tube attachment for use with standard Dura-Ace Di2 ST-9070 Shifters, and other 9070-series accessories. Wires are not included. The EW-SD50 (sold separately) rear wire is required to connect SM-EW67 Front Wire/Junction (Junction A) to the Rear Junction Box (Junction B; sold separately).

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.