This product uses a technologically innovative, computerized switching system based on the Di2 concept with the product name SEIS (Shimano Electronic Intelligent System). The innovative shifting technology of the SEIS is still based on the Shimano Index System (SIS), whose outstanding shifting performance has proven itself over many years. The main difference between the systems is that the switching process is no longer carried out mechanically, but electronically. The switching process is carried out by simply pressing a button. No effort is required to shift gears, which brings significant advantages as the driver always has a firm grip on the handlebars and can concentrate on driving without being distracted by shifting gears. The shifting system enables precise and effortless shifting in all situations, even with cold hands or when the driver has completely exhausted himself. The switching performance can no longer be affected by dirty or stretched cables, as the switching signal is transmitted electronically. The control buttons work similarly to mechanical dual control levers, making it easy to get used to the new system.

E-Tube is a system platform for the Di2 concept (Digital Integrated Intelligence). E-Tube transmits interactive signals and supplies all electronic parts with power through “plug & play” connections. E-Tube is corrosion, stretch and frost resistant and ensures low maintenance. It offers optimal flexibility for your bike. With E-Tube Project you can customize the settings of electronic components and update the firmware via Windows PC or tablet or Update smartphone. It provides quick and easy access to electronic component information and provides an instant overview of system status.