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SPECIALIZED Aethos Pro Ultegra Di2 2021 Road Bike

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Product Description

The Aethos line promises three things: unprecedented weight savings, perfectly-balanced ride quality, and undeniable style. For the Aethos Pro we threw out the rulebook to create the ride of your life. 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. 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 Specialized have 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.

Road Bike Buying Guide

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 S-Works Short & Shallow
STEM Specialized Pro SL, alloy, 4-bolt
TAPE Supacaz Super Sticky Kush
SEATPOST Roval Alpinist Carbon Seatpost
BRAKES Shimano Ultegra R8070, hydraulic disc
SHIFT LEVERS Shimano Ultegra Di2 R8050
FRONT DERAILLEUR Shimano Ultegra Di2 R8050
CHAIN Shimano Ultegra, 11-speed
REAR DERAILLEUR Shimano Ultegra Di2 R8050
CRANKSET Shimano Ultegra R8000
FRONT WHEEL Roval Alpinist CL, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub
REAR WHEEL Roval Alpinist CL, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub
TYRE S-Works Turbo, 320 TPI, 700x26mm
SADDLE Body Geometry Power Expert, Hollow Titanium Rails
  • The frame delivers compliance without compromise via the perfect balance of aerodynamics, light overall weight via a FACT 10r carbon construction, compliance, and Rider-First Engineering.

  • FACT Carbon Fork gives you more control on rough roads

  • Shimano Dura-Ace Di2 22-speed drivetrain for precise gear changes and making it easier to ride up steep hills

  • Shimano Dura-Ace Di2 Hydraulic DIsc Brakes give powerful, controllable and consistent stopping power with less effort

  • Roval Alpinist CL wheelset will deliver many unforgettable rides on the road thanks to its reliability

  • Turbo Cotton, 700x26mm for the fastest speed on the tarmac

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