The Aethos line promises three thingsexceptional light weight, perfectly-balanced ride characteristics, and undeniable styleand this Aethos pro is no exception. Aethos: Billions of calculations in the pursuit of one thingthe perfect ride.

Specd with Shimano’s Ultegra Di2 that delivers clean, crisp shifts and Rovals Alpinist wheels mated to DT Swiss 350 hubs and your left with a no-fuss build that delivers, mile after mile.

• The Aethos frame has been designed with the perfect combination of ultimate ride feel, light weight, and stylefrom accelerating up steep pitches and descending technical descents, to all-day saddle comfort on even the longest coffee rides, the Aethos hits the mark. But how, you ask? By reinventing the traditional road shape found on bikes of the past, weve subtly altered these shapes to deliver massive gains in stiffness and balance, all without affecting weight or durability. Pair that with an entirely new layup and process that weve perfected over multiple decades and you have the lightest frame out there (585 grams, S-Works, size 56cm). The Aethos is more than just a new bike, its the first of a new breed.
• A featherweight frame is useless without confidence-inspiring ride characteristics, which is why weve developed the Aethos to have the perfect balance of front and rear stiffness combined with exceptional ride quality. By studying the flexing and breathing of carbon fiber, we were able to discover groundbreaking findings about how forces flow through frames. Just a few pedal strokes and youll realize this sublime ride sets a new standard.
• Every detail, from the derailleur hangers to the fork expander plug have been designed with style, weight, and durability in mind. Weve also specd it with Rovals all-new Alpinist carbon seatpost and wheels, further saving weight and improving ride characteristics. Everything in pursuit for the perfect ride

SpecificationsFRAMESETFrameAethos FACT 10r Carbon, Rider First Engineered, Threaded BB, 12x142mm thru-axle, flat-mount discSUSPENSIONForkFACT Carbon, 12x100mm thru-axle, flat-mount discCOCKPITSaddleBody Geometry Power Pro, hollow titanium railsSeatPostRoval Alpinist Carbon SeatpostHandlebarsS-Works Short & Shallow, 125mm Drop, 75mm Reach w/Di2 HoleSeat BinderSpecialized Alloy, 30mmStemSpecialized Pro SL, alloy, 4-boltTapeSupacaz Super Sticky KushBRAKESFront BrakeShimano Ultegra R8170, hydraulic discRear BrakeShimano Ultegra R8170, hydraulic discDRIVETRAINChainrings52/36TBottom BracketShimano Threaded BSA BBCranksetShimano Ultegra R81000Rear DerailleurShimano Ultegra Di2 R8150, 12-speedFront DerailleurShimano Ultegra Di2 R8150, braze-onShift LeversShimano Ultegra Di2 R8170, hydraulic discChainShimano M8100, 12-speed w/ quick linkDRIVETRAINCassetteShimano Ultegra, 12-speed, 11-30tRear DerailleurShimano Ultegra Di2 R8150, 12-speedWHEELS & TIRESFront WheelRoval Alpinist CL II, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes, Tubeless ReadyRear WheelRoval Alpinist CL II, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes, Tubeless ReadyInner Tubes700x20-28, 48mm Presta ValveFront TireS-works Turbo 2BR, 700x28mmRear TireS-works Turbo 2BR, 700x28mmWEIGHTWeight Size56Weight6.78kg (14 lb, 15.2 oz)Geometry

49 52 54 56 58 61 Crank Length 165 170 172.5 172.5 175 175 Handlebar Width 380 400 420 420 440 440 Stem Length 80 90 100 100 110 110 Saddle Width 155 155 143 143 143 143 Seatpost Length 300 300 360 360 360 360 Reach 375 380 384 395 402 408 Head Tube Angle 71.75 72.5 73 73.5 73.5 74 Chainstay Length 410 410 410 410 410 410 Top Tube Length, Horizontal 508 531 540 562 577 595 Seat Tube Angle 75.5 74 74 73.5 73.5 73 Stack 514 527 544 565 591 612 Seat Tube Length 431 462 481 504 532 567 BB Drop 74 74 72 72 72 72 Bike Standover Height 705 728 748 769 796 824 Trail 63 58 58 55 55 52 Fork Length, Full 369 369 369 369 369 369 Head Tube Length 109 157 184 204 137 120 BB Height 266 268 268 268 268 266 Fork Rake/Offset 47 47 44 44 44 44 Front Center 574 577 579 591 606 613 Wheelbase 973 975 978 991 1005 1012