The new Aethos represents three things: exceptionally low weight, perfectly balanced riding characteristics, and undeniable style. Billions of calculations with just one goal - the perfect ride. And the Aethos Pro is no exception. The straightforward setup with ULTEGRA Di2 drive by Shimano, which ensures clean and crisp shifting, and the new Alpinist wheels by Roval with DT Swiss 350 hubs leave absolutely nothing to be desired, kilometer after kilometer.