Di2 Compatibility - mix Ultegra, DURA-ACE, XTR, XT and GRX components
Did you know that you can mix Di2 components from different series and categories? Mixing derailleurs is not recommended, but anything else is fair game!
The EW-AD305 adapter lets you connect the older EW-SD50 wires to the new EW-SD300 E-Tube wires.
You plug in the EW-SD50 in one end, the EW-SD300 in the other end. This way you can connect current and future Di2 components to each other.
It is about 31mm long and 8mm in width / diameter.
If you want to update the firmware on 12-speed Di2 components, you'll need to use the SM-PCE02 tool. This tool was released a couple of years ago, long before the EW-SD300 wiring standard even existed.
As a result, you need to use an EW-AD305 adapter to connect the SM-PCE02 to 12-speed bikes. They're not expensive, but it's something to be aware of.
Did you know that you can mix Di2 components from different series and categories? Mixing derailleurs is not recommended, but anything else is fair game!
Building a 12-speed Di2 Time Trial (TT) or Triathlon bike isn't as straightforward as you might think. What components can you use, and how do you connect them?