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S-Works Aethos - Dura-Ace Di2

S-Works Aethos - Dura-Ace Di2

We deliver! Just say when and how.

Don’t get us wrong, we’re all for racing. Grand Tour top steps, Classic’s Monuments—they’re in our DNA. But sometimes riding simply to ride, riding for the love of riding, is just what we need. And this is what the Aethos lives for. Sure, it’s given nothing up to performance, and happens to be the lightest frame out there, but with no compromise to style. Aethos: Billions of calculations in the pursuit of one thing—the perfect ride.

Top off the world’s lightest frame with Shimano’s legendary Dura-Ace Di2 groupset and Roval’s featherweight Alpinist wheels and you’re left with a perfectly balanced top-tier ride that gives up nothing in the name of performance.

Technical Specifications



S-Works Aethos FACT 12r Carbon, Rider First Engineered™, Threaded BB, Electronic cable routing only, 12x142mm thru-axle, flat-mount disc



S-Works FACT Carbon, 12x100mm thru-axle, flat-mount disc



S-Works Short & Shallow, 125mm Drop, 75mm Reach w/Di2 Hole


S-Works SL, alloy, titanium bolts, 6-degree rise


Supacaz Super Sticky Kush


Body Geometry S-Works Power, carbon fiber rails, carbon fiber base


Roval Alpinist Carbon Seatpost

Seat Binder

Specialized Alloy, 30.0mm, titanium bolt


Front Brake

Shimano Dura-Ace R9270, hydraulic disc

Rear Brake

Shimano Dura-Ace R9270, hydraulic disc


Shift Levers

Shimano Dura-Ace R9270, hydraulic disc

Front Derailleur

Shimano Dura-Ace R9250, braze-on

Rear Derailleur

Shimano Dura-Ace R9250, 12-speed


Shimano Dura-Ace, 12-speed, 11-30t


Shimano Dura-Ace R9200, HollowTech II, 12-speed with 4iiii Precision Pro dual-sided powermeter



Bottom Bracket

Shimano Dura-Ace, BB-R9100


Shimano XTR M9100, 12-speed w/ quick link


Front Wheel

Roval Alpinist CLX, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, Roval AFD hub, 21h, DT Swiss Aerolite spokes

Rear Wheel

Roval Alpinist CLX, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, Roval AFD hub, 24h, DT Swiss Aerolite spokes

Front Tire

Turbo Cotton, 320 TPI, 700x26mm

Rear Tire

Turbo Cotton, 320 TPI, 700x26mm

Inner Tubes

Turbo Ultralight, 48mm Presta valve

* Weights based on production painted frames as pictured. Actual weights will vary based on colorway, frame size, and component variation. Specifications are subject to change without notice.


Crank Length165mm170mm172.5mm172.5mm175mm175mm
Stem Length80mm90mm100mm100mm110mm110mm
Handlebar Width380mm400mm420mm420mm440mm440mm
Seatpost Length300mm300mm360mm360mm360mm360mm
Saddle Width155mm155mm143mm143mm143mm143mm
Head Tube Length109mm120mm137mm157mm184mm204mm
Seat-Tube Angle71.75°72.5°73°73.5°73.5°74°
BB Height266mm266mm268mm268mm268mm268mm
BB Drop74mm74mm72mm72mm72mm72mm
Fork Length, Full369mm369mm369mm369mm369mm369mm
Fork Rake/Offset47mm47mm44mm44mm44mm44mm
Front Center574mm577mm579mm591mm606mm613mm
Chainstay Length410mm410mm410mm410mm410mm410mm
Top Tube Length, Horizontal508mm531mm540mm562mm577mm595mm
Bike Standover Height705mm728mm748mm769mm796mm824mm
Seat Tube Length431mm462mm481mm504mm532mm567mm
Seat Tube Angle75.5°74°74°73.5°73.5°73°
Voted Best Brand 5 Years in a Row

#1 Again: 2023 Gran Fondo Awards

The riders have spoken! For the fifth year in a row, Specialized has been crowned the #1 “Drop Bar Bike Brand” in the prestigious Gran Fondo Best Brand Awards for 2023. We innovate for riders, and year after year, our bikes are loved by the most discerning riders. Thank you!

Reinventing Round

Meditating on the breathing and swaying of a bike under load in the lab, lead engineer Peter Denk had an epiphany—true performance lies in the shape, not the material. After a few hundred thousand supercomputer simulations, we knew we were right.

Break the Rules

At just 585 grams, the Aethos frame may be too light for the UCI rule book, but when the pros get a chance to just ride, it’s the Aethos they reach for. Ride along with the World Champ as he takes us up his favorite climb on a very special Aethos.

Aethos x 12 SPD

A bike built for the pure love of riding with the latest electronic 12-spd group from Shimano? Win, win. Faster, more precise shifting with an ultra-efficient drivetrain and a wireless cockpit to help you make the most of your new Aethos.

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