What is E-Tube? Essentially, it's just the name Shimano gave their electronic communication system. Then, a couple of years later, the SD300 wiring standard was introduced. This 10-speed system uses a different wiring standard from all the Di2 groupsets that followed, and with the release of Ultegra 6770 (2011) Shimano introduced the EW-SD50 wires - and E-Tube. It has been around for a while now - the first DURA-ACE Di2 groupset was the 7970 series, released in 2009. What does the button on the rear derailleur do?ĭigital Integrated Intelligence, or just " Di2", is Shimano's electronic shifting.How long does the main Di2 battery last between charges?.
How do you check the shifter battery level?.Mobile app? I connected and now the bike doesn't work.How do I shift the bike? What shift buttons are there?.Do I need to switch the system on or off?.If you're looking for the 10-speed / 11-speed Di2 new user manual, visit my 10/11-speed Di2 beginner manual page.īelow is the list of subjects covered in this guide - click any of the links to skip ahead to the relevant section. The supplied manuals usually aren't great, but don't worry - I'll walk you through the things you should absolutely know about 12-speed (wireless) Di2. If you've recently bought a new 12-speed Di2 bike - congratulations! I'm sure you have a lot of questions or are wondering how the nitty-gritty specifics of your bike work.
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