Introducing the Shimano Junct-A SM-EW90 E-Tube, a cutting-edge electronic shifting system designed to elevate your cycling experience. Weighing just 50 grams, this lightweight component offers seamless and precise gear changes for optimal performance on the road or trail. The Junct-A SM-EW90 E-Tube features advanced technology, including Di2 compatibility, allowing for effortless customization and control of your shifting preferences. With its sleek design and durable construction, this Shimano product is built to withstand the demands of avid cyclists. Enhance your ride with the Shimano Junct-A SM-EW90 E-Tube and enjoy the benefits of smooth, reliable shifting every time you hit the road.