Originally Posted by
cruiserhead
Like I said, no Ultegra or Dura Ace Di2 hydro yet.
When released, I remember Shimano saying they didn't go wireless for various factors but that was a few years ago now and maybe they have overcome them.
It's either Ultegra or DA. Kind of hair splitting just because it doesn't have a name plate. Would have to be at least Ultegra level.
Can't imagine that Shimano doesn't have it working internally. The hard part is the mech and the electro-mech part of the system. They already have the Di2 system talking out on ANT+ and there are any number of chips available to do the two way communication on a coin cell battery from the shifters to the rest of it - relatively simple problem electronically.
J.