The 2025 Aethos Pro Ultegra Di2 Bicycle embodies the core promises of the Aethos line—exceptional lightweight performance, perfectly balanced ride characteristics, and undeniable style. Built with billions of calculations in pursuit of the perfect ride, this model redefines road cycling through its innovative design. The Aethos Pro’s FACT 10r Carbon frame, Rider First Engineered™, features a threaded bottom bracket and a 12x142mm thru-axle with flat-mount disc brakes, delivering massive gains in stiffness and balance without compromising durability or weight. This revolutionary approach means every ride, from steep accelerations to technical descents, is executed with sublime precision.

Powered by Shimano’s Ultegra Di2 system, the Aethos Pro offers clean, crisp shifting paired with a drivetrain designed for efficiency. The setup includes 52/36T chainrings, a Shimano Ultegra 12-speed cassette (11-30t), and a bottom bracket built with Shimano Threaded BSA standards. The integration of the Ultegra Di2 front and rear derailleurs, shift levers, and a crankset featuring a 4iiiis Precision 3+ Power Meter ensures that every gear change is responsive and accurate, further enhancing the bike’s performance-oriented design.

Completing the package are the high-performance components that elevate ride quality and control. The braking system features Shimano Ultegra R8170 hydraulic disc brakes with 160mm front and 140mm rear rotors, while Roval Alpinist CL II wheels with 21mm internal width, 33mm depth, and DT for Roval 350 hubs ensure optimal power transfer and stability. The cockpit is outfitted with a Body Geometry Power Pro saddle, Roval Alpinist Carbon Seatpost, S-Works Short & Shallow handlebars, Specialized Pro SL alloy stem, and Supacaz Super Sticky Kush tape. Weighing just 6.78kg in size 56, the Aethos Pro sets a new benchmark in high-performance cycling.