Specialized 2026 Aethos 2 Expert Shimano Ultegra Di2 Road Bike

The 2026 Specialized Aethos 2 Expert Ultegra Di2 Road Bike has been updated with refined geometry for a better fit, improved tyre clearance and new cockpit and wheels. It remains a super light bike built for road purists.

The original Aethos came out of research Specialized did on how carbon frames behave. By feeding their data through a supercomputer they came up with Flow State Design.

This created a new carbon layup which has since become the basis of designs for Specializeds Cruz and Tarmac SL8 bikes. The Aethos is still the lightest production frame in the world and still has pure and smooth handling.

The Aethos 2 Expert Ultegra Di2 comes with Shimano Ultegra Di2 12 speed electronic gearing and Roval C38 wheels with carbon rims along with Alpinist handlebars and seatpost. This bike is perfect for Road purists who want a classic, clean looking super light road bike thats responsive and fun to ride, yet comfortable enough for big days out.

The Aethos 2 Expert uses 2025 Roval wheels and bars to keep the price down. Key Features Use - Performance Road Riding Frameset - 705g FACT 10r Frame / FACT 10r Fork Fit - Performance Endurance Cockpit amp Wheels - Roval Alpinist bar, Pro SL stem, C38 wheels Drivetrain - Shimano Ultegra Di2Weight - 7.12kg (56cm)