Originally Posted by
WheresWaldo
... If only Shimano had a triple in Di2!
First, Shimano needs to release a triple Dura Ace crankset. The 7900 series includes no such thing, and the triples for the 7800 and 7700 series were sorry excuses for triples (the middle ring was basically a triplizer with an odd inner BCD that only allowed a special 30 tooth ring to be used).
There's not going to be a triple version of Di2 until they make an Ultegra-level version of it. I saw a comment from a journalist that had asked Shimano about the possibility of Di2 trickling down to lower groups at one of this year's bike shows and apparently the response was not very optimistic at all, so it looks like it will be at least a couple of years away for a lower-level setup (and therefore triple-ring compatibility).