New R9300-series Dura-Ace wheels

Shimano has just announced their latest set of wheels, the R9300 Dura-Ace wheelsets.

They feature an internal rim width of 23mm, cup-and-cone system with replaceable bearings, external rim widths engineered to balance aerodynamics and crosswind stability, and Shimano's own carbon spokes.

Here are the relevant bits from the press release (media.shimano.com):

Carbon Spokes: Purpose-Built for Race Demands

A defining innovation of the WH-R9370 wheelsets is Shimano’s newly engineered carbon spokes, developed in two profiles to match specific performance objectives:

Super Aero: 5.2 mm × 0.8 mm

Aero: 4.0 mm × 1.1 mm

The wheels come in a lightweight 36mm version (1170g per set), 50mm (1302g), 60mm (1389g), and 99mm dedicated TT front-wheel (792g). There's also a 987g rear disc wheel, meant to be paired with the C99 front wheel.

These wheelsets should be available from September 2026 onwards.

More images can be found on Shimano's media site: https://media.shimano-eu.com/en-CEU/assets/726e60e9aa5e86364fc35476e334f122d6729973/