The Specialized S-Works Aethos Frameset is an ultralight road frame engineered for comfort, climbing prowess, and refined ride quality. Its Rider-First Engineered™ carbon layup ensures consistent stiffness and compliance across all sizes, while a sculpted top tube, slender seatstays, and slim fork blades deliver a supple yet lively feel. Internal cable routing keeps lines tidy and reduces wind drag, and hardpoint mounts accommodate a direct-mount front derailleur and down-tube bottle cage.

• Material: FACT 12r carbon, Rider-First Engineered™ layup

• Weight: approximately 585 g (56 cm frame only)

• Geometry: endurance-race balance with 73.5° head tube angle and 74° seat tube angle

• Fork: FACT carbon with tapered steerer, flat-mount disc brake

• Bottom bracket: OSBB (68 mm English) for stiffness and seal

• Cable routing: fully internal for Di2/eTap and mechanical systems

• Tire clearance: up to 32 mm road tires

• Hardware included: direct-mount front derailleur mount, thru-axle skewers