Specialized Aethos Pro Ultegra Di2
Specialized Aethos Pro Ultegra Di2

Specialized Aethos Pro Ultegra Di2

Regular price$9,999.99 CAD


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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.

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

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

Body Geometry Power Pro, hollow titanium rails

Roval Alpinist Carbon Seatpost

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

Seat Binder
Specialized Alloy, 30mm

Specialized Pro SL, alloy, 4-bolt

Supacaz Super Sticky Kush

Front Brake
Shimano Ultegra R8170, hydraulic disc

Rear Brake
Shimano Ultegra R8170, hydraulic disc


Shimano Ultegra, 12-speed, 11-30t

Bottom Bracket
Shimano Threaded BSA BB

Rear Derailleur
Shimano Ultegra Di2 R8150, 12-speed

Shimano Ultegra R8100 with 4iiiis Power Meter

Front Derailleur
Shimano Ultegra Di2 R8150, braze-on

Shift Levers
Shimano Ultegra Di2 R8170, hydraulic disc

Shimano M8100, 12-speed w/ quick link

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

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

Inner Tubes
700x20-28, 48mm Presta Valve

Front Tire
S-works Turbo 2BR, 700x28mm

Rear Tire
S-works Turbo 2BR, 700x28mm

Weight Size

6.78kg (14 lb, 15.2 oz)

*Specifications subject to change without notice
49 52 54 56 58 61
A | Reach 375mm 380mm 384mm 395mm 402mm 408mm
B | Stack 514mm 527mm 544mm 565mm 591mm 612mm
C | Head Tube Angle 71.75° 72.5° 73° 73.5° 73.5° 74°
D | Front Center 574mm 577mm 579mm 591mm 606mm 613mm
E | BB Drop 74mm 74mm 72mm 72mm 72mm 72mm
F | Wheelbase 973mm 975mm 978mm 991mm 1005mm 1012mm
G | Chainstay Length 410mm 410mm 410mm 410mm 410mm 410mm
H | Head Tube Length 109mm 120mm 137mm 157mm 184mm 204mm
I | Top Tube Length 508mm 531mm 540mm 562mm 577mm 595mm
J | Seat Tube Angle 75.5° 74° 74° 73.5° 73.5° 73°
K | Standover 705mm 728mm 748mm 769mm 796mm 824mm
Size Height
49 155 - 163cm
52 163 - 170cm
54 170 - 175cm
56 175 - 180cm
58 180 - 188cm
61 188 - 196cm

The sizing chart is a great place to start when picking your next bike but everyone will fit a bike a bit differently. Your torso, arm, and leg lengths all play into what size of bike you may need. Plus, there's your own personal preference.

We always recommend swinging by the shop and taking the bike that you're looking for a spin to see how it feels. If you're unable to come by, looking at the geometry of your current bike and comparing it is a good place to start. If you have any further questions, our customer service team is there to help.

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