Shimano's New Dura-Ace R9300 Groupset Spotted at La Vuelta

Shimano's new Dura-Ace R9300 groupset was spotted at the Vuelta a España, featuring 13 speeds and a new shifter button, but it remains semi-wireless. This marks the first major update since 2021. The groupset was seen on Alpecin-Premier Tech bikes, showing a 13-sprocket cassette, alloy cranks, and a new protruding thumb button on the hoods. It retains a wired connection between derailleurs, unlike fully wireless competitors. Shimano's design includes a universal derailleur hanger similar to SRAM's, and the new freehub body will require upgrades for existing users. The crankset continues Shimano's alloy tradition, with prototype chainrings suggesting possible 1x compatibility.