Images published by sister site Cyclingnews, show what appears to be a new Shimano Dura-Ace groupset being ridden at the Vuelta a España. The new groupset features a 13-cog cassette, integrated satellite-hood shifters, and possibly a new freehub. But it still appears to be semi-wireless.
Given these sightings follow the official launch of the Dura-Ace R9370 wheels and months of online leaks and speculation, we imagine this is the R9300 version of Shimano's flagship road groupset.
