Specialized Aethos Pro Ultegra Di2 Bicycle

The Aethos prioritizes ride quality and weight efficiency over pure aerodynamic gains. While race bikes often use aggressive, stiff geometries, the Aethos features an endurance-focused geometry with a taller head tube and shorter reach to reduce fatigue on long rides without sacrificing agility.

The Shimano Ultegra Di2 R8100 system on this bike is semi-wireless. The shifters communicate wirelessly with the derailleur, but the derailleurs themselves are connected to a central battery hidden within the frame.

The frame is designed with a tire clearance of up to 33mm. This allows you to run slightly wider tires for better comfort and traction on rougher road surfaces.

The complete bike weighs approximately 17.64 lbs. Its lightweight FACT 10r carbon frame and Roval Alpinist carbon wheelset make it exceptionally responsive, especially on steep climbs.

Not at all. While the geometry is designed for comfort, it remains performance-oriented and handles with the precision you would expect from a high-end road bike. It is stable and comfortable for long days, but still plenty capable of spirited group riding.

The bike is equipped with hydraulic disc brakes and 160mm rotors, which provide consistent, powerful, and modulated stopping power in all weather conditions. They offer significantly more control and reliability than traditional rim brakes, especially on long descents.