The Specialized Aethos 2 Pro AXS road bike is the lightest in its class, designed to provide an exceptional riding experience that transcends simple weight savings. Built around a 705-gram FACT 10r frame, this complete bike offers responsive acceleration, compliant ride quality, and handling that feels intuitive across varied terrain. Data-driven geometry improvements based on 100,000+ Body Geometry fit sessions create a riding position that reduces fatigue during long efforts while maintaining performance capability. Specialized&';s Flow State Design emerged from studying frame behavior under load, where engineers identified distinct patterns in structural flex that revealed energy movement through the frame. This observation guided computational modeling that refined tube shapes beyond traditional round profiles, creating forms optimized for efficient force transfer. The approach reduces unnecessary carbon layering while maintaining structural performance, resulting in frames that meet rigorous testing standards. Geometry updates include 15mm additional stack height to ease upper body strain, a 7mm extended wheelbase for improved high-speed stability, and a half-degree slacker headtube angle that balances quick steering with predictable control. Clearance for 35mm tires expands versatility across road conditions while maintaining the frame&';s weight advantage through careful component selection and engineering refinement throughout the build. The Pro AXS specification features SRAM Force E1 wireless electronic shifting with integrated power measurement and 48/35 gearing that covers climbing and high-speed scenarios effectively. Roval Alpinist CL II wheels paired with S-Works Turbo TLR tires complete a build focused on balanced performance rather than single-metric optimization, creating a bike suitable for riders prioritizing overall ride quality and long-distance capability. Key Features Frame: FACT 10r Carbon with Flow State Design (705g) Drivetrain: SRAM Force E1 AXS with Integrated Power Meter (48/35, 12-Speed) Wheelset: Roval Alpinist CL II with S-Works Turbo TLR Tires