Aethos Comp - Shimano 105 Di2 (2025)
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What if Specialized used every ounce of experience they’ve gained serving riders over the past 46 years and built a bike made simply for the love of riding? The Aethos is designed to straddle the line between perfect ride quality, extreme lightweight, and undeniable style. The Aethos Comp model is no exception.
With low-maintenance, Shimano 105 Di2 electronic shifting and hydraulic disc brakes paired with bomb-proof DT Swiss R470 Disc wheels, you have the perfect steed to excite you out on the road.
FEATURES
- 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, further saving weight and improving ride characteristics. Everything in pursuit for the perfect ride.
Frame Aethos FACT 9R Carbon, Rider First Engineered™, Threaded BB, 12x142mm thru-axle, flat-mount disc Fork FACT Carbon, 12x100mm thru-axle, flat-mount disc Saddle Body Geometry Power Sport, steel rails SeatPost Roval Alpinist Carbon Seatpost Seat Binder Shimano 105 R7170, hydraulic disc Stem Specialized Pro SL, alloy, 4-bolt Handlebars Specialized Shallow Drop, 6061, 70x125mm, 31.8mm clamp Tape Roubaix S-Wrap Front Brake Shimano 105, Hydraulic disc Rear Brake Shimano 105 R7170, hydraulic disc Chainrings 50/34T Shift Levers Shimano 105 Di2 7170 Cassette Shimano 105, 12-speed, 11-34t Crankset FC-R7100, 105, 12-Speed, Holllowtech 2 Rear Derailleur Shimano 105 Di2 7150 Front Derailleur Shimano 105 Di2 7150, braze on Chain Shimano SLX M7100, 12-speed w/ quick link Bottom Bracket Shimano Threaded BSA BB Front Wheel DT R470 Disc Rear Wheel DT R470 Disc Inner Tubes Presta Valve Standard, 48mm valves Front Tire Turbo Pro, 700x28 Rear Tire Turbo Pro, 700x28 Weight Size 56 Weight 7.5 kg (16 lb, 8.6 oz) 49 49 52 52 54 54 56 56 58 58 61 61 Crank Length 165 165 170 170 172.5 172.5 172.5 172.5 175 175 175 175 Handlebar Width 380 380 400 400 420 420 420 420 440 440 440 440 Stem Length 80 80 90 90 100 100 100 100 110 110 110 110 Saddle Width 155 155 155 155 143 143 143 143 143 143 143 143 Seatpost Length 300 300 300 300 360 360 360 360 360 360 360 360 Reach 375 380 384 395 402 408 Head Tube Angle 71.75 72.5 73 73.5 73.5 74 Chainstay Length 410 410 410 410 410 410 Top Tube Length, Horizontal 508 531 540 562 577 595 Seat Tube Angle 75.5 74 74 73.5 73.5 73 Stack 514 527 544 565 591 612 Seat Tube Length 431 462 481 504 532 567 BB Drop 74 74 72 72 72 72 Bike Standover Height 705 728 748 769 796 824 Trail 63 58 58 55 55 52 Fork Length, Full 369 369 369 369 369 369 Head Tube Length 109 157 184 204 137 120 BB Height 266 268 268 268 268 266 Fork Rake/Offset 47 47 44 44 44 44 Front Center 574 577 579 591 606 613 Wheelbase 973 975 978 991 1005 1012 -
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