Specialized Aethos Expert

Aethos: Billions of calculations in the pursuit of one thing—the perfect ride. It’s more than just a motto, it’s a philosophy. The Aethos has been designed to straddle the line between a perfected ride quality, extreme light weight, and undeniable style, and this Expert model is no exception.

With quick-shifting, low-maintenance Ultegra Di2 electronic shifting and hydraulic disc brakes paired with bomb-proof Roval C38 Disc carbon wheels, you have the perfect steed to get you out on the road.

• The Aethos frame has been designed with the perfect combination of ultimate ride feel, light weight, and style—from 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, we’ve 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 we’ve 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, it’s the first of a new breed.
• A featherweight frame is useless without confidence-inspiring ride characteristics, which is why we’ve 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 you’ll 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. We’ve also spec’d it with Roval’s all-new Alpinist carbon seatpost, further saving weight and improving ride characteristics. Everything in pursuit for the perfect ride.

Frame
Aethos FACT 10R Carbon, Rider First Engineered™, Threaded BB, 12x142mm thru-axle, flat-mount disc

Fork
FACT Carbon, 12x100mm thru-axle, flat-mount disc

Handlebars
Specialized Expert Shallow Drop, alloy, 125mm drop x 75mm reach

Stem
Specialized Pro SL, alloy, 4-bolt

Tape
Supacaz Super Sticky Kush

SeatPost
Roval Alpinist Carbon Seatpost

Front Brake
Shimano Ultegra R8170, hydraulic disc

Seat Binder
Specialized Alloy, 30mm

Rear Brake
Shimano Ultegra R8170, hydraulic disc

Shift Levers
Shimano Ultegra R8170, hydraulic disc

Front Derailleur
Shimano Ultegra R8150, braze-on

Rear Derailleur
Shimano Ultegra R8150, 12-speed

Cassette
Shimano Ultegra, 12-speed, 11-30t

Crankset
Shimano Ultegra R8100

Chainrings
52/36T

Bottom Bracket
Shimano Threaded BSA BB

Chain
Shimano Ultegra, 12-speed

Front Wheel
Roval C38, 21mm internal width carbon rim

Rear Wheel
Roval C38, 21mm internal width carbon rim

Front Tire
S-Works Turbo, 120 TPI, folding bead, BlackBelt protection, 700x26mm

Rear Tire
S-Works Turbo, 120 TPI, folding bead, BlackBelt protection, 700x26mm

Saddle
Body Geometry Power Expert, titanium rails

Inner Tubes
Turbo Ultralight, 48mm Presta valve

* Specifications are subject to change without notice