13-Speed Dura-Ace R9350 at the Vuelta

Shimano's new 13-Speed Di2 groupset has appeared at la Vuelta, earlier this month.

One of the Alpecin-Premier Tech was photographed featuring a prototype of Shimano's next Dura-Ace Di2 groupset, R9350.

Front derailleur FR-R9350 and FC-R9300-P power meter

The front derailleur and a prototype power meter crankset were on display as well. The front derailleur seems to be the current Dura-Ace front derailleur, but it's hard to tell from the pictures.

Disc brake shifter: ST-R9370

Then there's the shifters, ST-R9370, with new button on the inside. It looks like this will be pressed using your thumb, and can probably be pushed up as well as down.

The internals: FCC images

A week later, FCC-like pictures appeared of the rear derailleur servo enclosing, as well as the power meter. These were posted by ooo on the WeightWeenies forum.

It looks like the 13-speed rear derailleur uses a new charging cable