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Specialized Aethos Pro - Shimano Ultegra Di2 (2025)

Specialized Aethos Pro - Shimano Ultegra Di2 (2025)

Regular price $6,999.99
Regular price $8,000.00 Sale price $6,999.99
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Color: Pink
Size
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Height (Cm) Size
5'1"-5'4" 49
5'4"-5'6" 52
5'6"-5'9" 54
5'9"-6'0" 56
6'0"-6'3" 58
6'3"-6'6" 61

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SKU:97225-1052

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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

Frameset

  • 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

Suspension

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

Brakes

  • Front Brake: Shimano Ultegra R8170, hydraulic disc, 160mm rotor
  • Rear Brake: Shimano Ultegra R8170, hydraulic disc, 140mm rotor

Drivetrain

  • Chainrings: 52/36T
  • Cassette: Shimano Ultegra, 12-speed, 11-30t
  • Bottom Bracket: Shimano Threaded BSA BB
  • Rear Derailleur: Shimano Ultegra Di2 R8150, 12-speed
  • Crankset: Shimano Ultegra R8100 with 4iiii Precision 3+ Power Meter
  • Front Derailleur: Shimano Ultegra Di2 R8150, braze-on
  • Shift Levers: Shimano Ultegra Di2 R8170, hydraulic disc
  • Chain: Shimano M8100, 12-speed w/ quick link

Wheels & Tires

  • Inner Tubes: 700x20-28, 48mm Presta Valve
  • 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

Cockpit

  • Saddle: Body Geometry Power Pro with Mirror, hollow titanium rails
  • SeatPost: Roval Alpinist Carbon Seatpost
  • Handlebars: S-Works Short & Shallow, 125mm Drop, 75mm Reach w/Di2 Hole
  • Seat Binder: Specialized Alloy, 30mm
  • Stem: Specialized Pro SL, alloy, 4-bolt
  • Tape: Supacaz Super Sticky Kush

Product Details

  • Product ID: 221544
  • Weight:
FACT Carbon Fiber

FACT Carbon Fiber

Short for Functional Advanced Composite Technology, is a comprehensive engineering process that guides the development of frames and components, all the way from initial sketches to finished products.

More Info
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
Stack 514 527 544 565 591 612
Reach 375 380 384 395 402 408
Head Tube Length 109 120 137 157 184 204
Head Tube Angle 71.75 72.5 73 73.5 73.5 74
BB Height 266 266 268 268 268 268
BB Drop 74 74 72 72 72 72
Trail 58 55 55 52 63 58
Fork Length, Full 369 369 369 369 369 369
Fork Rake/Offset 47 47 44 44 44 44
Front Center 574 577 579 591 606 613
Chainstay Length 410 410 410 410 410 410
Wheelbase 973 975 978 991 1005 1012
Top Tube Length, Horizontal 508 531 540 562 577 595
Bike Standover Height 705 728 748 769 796 824
Seat Tube Length 431 462 481 504 532 567
Seat Tube Angle 75.5 74 74 73.5 73.5 73

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