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Aethos Pro

Shimano Ultegra Di2

5

3 Reviews

The Aethos line promises three things—exceptional light weight, perfectly-balanced…

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#1 Again: 2023 Gran Fondo Awards
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!

The lightest disc road frame ever: The Specialized Aethos

Product Details

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The Aethos line promises three things—exceptional light weight, perfectly-balanced ride characteristics, and undeniable style—and this Aethos pro is no exception. Aethos: Billions of calculations in the pursuit of one thing—the perfect ride.

Spec’d with Shimano's Ultegra Di2 that delivers clean, crisp shifts and Roval’s 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 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 and wheels, further saving weight and improving ride characteristics. Everything in pursuit for the perfect ride

Technical Specifications

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Frameset

Frame

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

Suspension

Fork

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

Brakes

Front Brake

Shimano Ultegra R8170, hydraulic disc

Rear Brake

Shimano Ultegra R8170, hydraulic disc

Drivetrain

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

Chain

Shimano M8100, 12-speed w/ quick link

Crankset

Shimano Ultegra R81000 with 4iiiis Power Meter

Chainrings

52/36T

Bottom Bracket

Shimano Threaded BSA BB

Wheels & Tires

Front Wheel

Roval Alpinist CL II, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes, Tubeless Ready

Rear Wheel

Roval Alpinist CL II, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes, Tubeless Ready

Front Tire

S-works Turbo 2BR, 700x28mm

Rear Tire

S-works Turbo 2BR, 700x28mm

Inner Tubes

700x20-28, 48mm Presta Valve

Cockpit

Tape

Supacaz Super Sticky Kush

Stem

Specialized Pro SL, alloy, 4-bolt

Handlebars

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

Saddle

Body Geometry Power Pro, hollow titanium rails

SeatPost

Roval Alpinist Carbon Seatpost

Seat Binder

Specialized Alloy, 30mm

Weight

Weight

6.93kg (15 lb, 4.4 oz)

Weight Size

56

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

Geometry

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495254565861
Crank Length165mm170mm172.5mm172.5mm175mm175mm
Handlebar Width380mm400mm420mm420mm440mm440mm
Stem Length80mm90mm100mm100mm110mm110mm
Saddle Width155mm155mm143mm143mm143mm143mm
Seatpost Length300mm300mm360mm360mm360mm360mm
Wheelbase973mm975mm978mm991mm1005mm1012mm
Top Tube Length, Horizontal508mm531mm540mm562mm577mm595mm
Bike Standover Height705mm728mm748mm769mm796mm824mm
Seat Tube Length431mm462mm481mm504mm532mm567mm
Seat Tube Angle75.5°74°74°73.5°73.5°73°
Stack514mm527mm544mm565mm591mm612mm
Reach375mm380mm384mm395mm402mm408mm
Head Tube Length109mm120mm137mm157mm184mm204mm
Head Tube Angle71.75°72.5°73°73.5°73.5°74°
BB Height266mm266mm268mm268mm268mm268mm
BB Drop74mm74mm72mm72mm72mm72mm
Trail63mm58mm58mm55mm55mm52mm
Fork Length, Full369mm369mm369mm369mm369mm369mm
Fork Rake/Offset47mm47mm44mm44mm44mm44mm
Front Centre574mm577mm579mm591mm606mm613mm
Chainstay Length410mm410mm410mm410mm410mm410mm
Geometry

Rider Reviews

5

3 Reviews

 

Amazing, Classic and timeless

The Rider's Bike. While it may not be for some, I truly enjoy the classic look of the Aethos combined with the modern build specs. I bought this bike to enjoy riding and get exercise. I dont race and likely never will. So I believe the Aethos is what 90% of us should be riding, if we are realistic with our performance. It's supremely comfortable and easy to work on. When trends fade this will still look just as good. Do yourself a favor and pick this bike up if you can swing the cost. You won't regret it.


Name:
Spencer

Helpful?

Clean and simple!

Sold my Tarmac Pro SL4 after having it for almost 10 years. Purchased the new Aethos Pro and love the clean look with very little decals. Disc brakes and electronic shifting are a huge plus. The ride is a lot more comfortable than my old Tarmac. Climbing is noticeably easier too. Looking forward to a lot of rides in 2024!!!

Would Recommend?
Yes!

Name:
Steve

Helpful?

Superb riding!

Lightweight and responsive, this comfortable Aethos rides and handles better than any bike I’ve ever tested or ridden. I’ve broken most of my Strava PRs since I got the bike after a tremendous amount of research. Definitely the bike for me (not a racer, just love to ride and climb - over 15,0000 miles/year).

Would Recommend?
Yes!

Name:
Lonnie

Helpful?