Di2 Frequently Asked Questions If you have any questions regarding Di2 chances are they are covered either in the Di2 for Dummies page or this list of Frequently Asked Questions.
However, it is of course possible that your specific case is not listed here. In that case just get in touch and I'll do my best to help you get back on the bike!
App error message: Enter in 6 half-width numerals How do I install the EW-WU111 D-Fly on my 12-speed Di2 bike? Where do the spacers on 12-speed Shimano cassettes go? Can I use a 12-speed SRAM cassette with my 12-speed Di2? E-Tube Project 3.4.5: there may be a problem with the internet connection Can I use a 12-speed chain with 11-speed Di2? How about cranksets and chain rings? My TT/Tri bike no longer automatically shifts the front derailleur My 12-speed Di2 bike is unresponsive, how to reset 12-speed Di2 When I change my Di2 cassette, do I have to change settings in the app? How do I update my SM-PCE1 firmware so that I can use E-Tube Project V4? Can I use Dura-Ace / Ultegra shifters with 105 Di2 derailleurs? What is the difference between EW-SD300 and EW-SD300-I wires? How do I see Di2 info on my HammerHead Karoo 1 or Karoo 2 device? E-Tube Cyclist mobile app doesn't start on Android phones How do you replace a Di2 wireless shifter battery? How do I update my wireless R9270 / R8170 / R7170 levers? E-Tube Project Professional won't work with my charger. I don't own SM-PCE02! How can I determine a Shimano component manufacturing date? How do I update my SM-BCR2 Charger firmware so that I can use E-Tube Project? How can I reset my Di2 system? When should I replace my Di2 battery? How do I check the battery charge level? Can I use my Dura-Ace Di2 7970 with newer hardware? I read that I can mix different series hardware. I tried, but it doesn’t work? How long will the battery charge last? How does this site generate income? Can I use a GRX crank with a road or MTB front derailleur? Do I have to use a B Junction in my Di2 build? (11-speed Di2) Can I use the MT800 display on my road bike? I had a crash and my rear derailleur stopped working. How do I reset it? Can I use my road shifters with mtb derailleurs? Or the other way around? How do I use e-Tube software on my Apple Macbook? My Di2 won't connect to the mobile app More LEDS come on after I check the battery level - what do they mean? I can't remember my e-Tube mobile app passkey. How do I reset that? How do I connect or disconnect Di2 electric wires? What do I need to use Synchronized Shifting? How do I enable or change Synchronized Shift mode? My Di2 front derailleur is rubbing the chain. How do I fix that? How do I update Di2 firmware? How does the e-Tube synchronized shift map work? What is e-Tube? And e-Tube Project software? Where can I download Shimano e-Tube? Di2 Software? E-Tube asked me to change the passkey and now it won't connect I cannot shift to the smallest sprockets when in the small chain ring When is Shimano Di3 going to be released? And 12-speed Di2 for MTB? I pressed the button on the junction box, but bluetooth won't connect