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No Hassle Returns
With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.
Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!
With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.
So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.
Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.
The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.
Call us if it's a bike as we can help arrange collection. Tel 01752 849315 or info@certini.co.ukPlease fill in the downloadable returns form to complete and return with your goods.CLICK HERE TO DOWNLOAD THE RETURNS FORMReturns Address:
Brand:Shimano
Code:SMEW90B
The Shimano Di2 SM-EW90-B Junction-A (5 Port) is an essential component for your Shimano Di2 electronic shifting system, designed to seamlessly connect your Di2 shifters to the down tube junction wire via E-Tube cables. By replacing traditional mechanical gear cables with advanced electronic wiring, this junction box ensures effortless, precise, and reliable shifting performance in all conditions.
Built with water-resistant connectors and a compact, lightweight design, the SM-EW90-B Junction-A is perfect for both road and time trial bikes running Di2 11-speed or 12-speed drivetrains. It also features a convenient battery level indicator, an additional charging port when paired with an internal battery, and a gear index setup switch for fine-tuning adjustments directly from the shifters.
Upgrade your bike’s electronic drivetrain with the Shimano Di2 SM-EW90-B 5-Port Junction-A, ensuring smooth, accurate, and effortless shifting on every ride.
General Unisex Brand Information