S-Works Aethos

SRAM Red eTap AXS

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2021 S-Works Aethos

SRAM Red eTap AXS

3 Reviews

For once, we’re not in it to win. With Aethos, we stopped worrying about winning,…

Product Details

For once, we’re not in it to win. With Aethos, we stopped worrying about winning, or the way things are supposed to be done, and instead chased the greatest expression of ride quality ever made. Well, we did it, and in staying true to keeping that promise, we broke every design, ride, and race rule along the way. And we’re not sorry. Aethos: Break the Rules.

Top off the world’s lightest frame with SRAM’s 12-speed RED eTAP AXS groupset and Roval’s featherweight Alpinist wheels and you’re left with a perfectly balanced top-tier ride that delivers everything in the name of performance.

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.
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.
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.
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

Frameset

Frame

S-Works Aethos FACT 12r Carbon, Rider First Engineered™, Threaded BB, Electronic cable routing only, 12x142mm thru-axle, flat-mount disc

Seat Binder

Specialized Alloy, 30.0mm, titanium bolt

Cockpit

Tape

Supacaz Super Sticky Kush

Stem

S-Works SL, alloy, titanium bolts, 6-degree rise

Handlebars

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

Saddle

Body Geometry S-Works Power, carbon fiber rails, carbon fiber base

SeatPost

Roval Alpinist Carbon Seatpost

Suspension

Fork

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

Brakes

Front Brake

SRAM RED eTAP AXS, hydraulic disc

Rear Brake

SRAM RED eTAP AXS, hydraulic disc

Drivetrain

Front Derailleur

SRAM RED eTAP AXS, braze-on

Rear Derailleur

SRAM RED eTAP AXS, 12-speed

Cassette

SRAM RED XG-1290, 12-speed, 10-33t

Chain

SRAM CN Red 12-speed

Crankset

SRAM RED AXS Power Meter

Bottom Bracket

SRAM DUB BSA 68

Wheels & Tires

Front Wheel

Roval Alpinist CLX, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, Roval AFD hub, 21h, DT Swiss Aerolite spokes

Rear Wheel

Roval Alpinist CLX, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, Roval AFD hub, 24h, DT Swiss Aerolite spokes

Front Tire

Turbo Cotton, 320 TPI, 700x26mm

Rear Tire

Turbo Cotton, 320 TPI, 700x26mm

Inner Tubes

Turbo Ultralight, 48mm Presta valve

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

Geometry

	49	52	54	56	58	61
Crank Length	165mm	170mm	172.5mm	172.5mm	175mm	175mm
Handlebar Width	380mm	400mm	420mm	420mm	440mm	440mm
Stem Length	80mm	90mm	100mm	100mm	110mm	110mm
Saddle Width	155mm	155mm	143mm	143mm	143mm	143mm
Seatpost Length	300mm	300mm	360mm	360mm	360mm	360mm
Stack	514mm	527mm	544mm	565mm	591mm	612mm
Reach	375mm	380mm	384mm	395mm	402mm	408mm
Head Tube Length	109mm	120mm	137mm	157mm	184mm	204mm
Head Tube Angle	71.75°	72.5°	73°	73.5°	73.5°	74°
BB Height	266mm	266mm	268mm	268mm	268mm	268mm
BB Drop	74mm	74mm	72mm	72mm	72mm	72mm
Trail	63mm	58mm	58mm	55mm	55mm	52mm
Fork Length, Full	369mm	369mm	369mm	369mm	369mm	369mm
Fork Rake/Offset	47mm	47mm	44mm	44mm	44mm	44mm
Front Center	574mm	577mm	579mm	591mm	606mm	613mm
Chainstay Length	410mm	410mm	410mm	410mm	410mm	410mm
Wheelbase	973mm	975mm	978mm	991mm	1005mm	1012mm
Top Tube Length, Horizontal	508mm	531mm	540mm	562mm	577mm	595mm
Bike Standover Height	705mm	728mm	748mm	769mm	796mm	824mm
Seat Tube Length	431mm	462mm	481mm	504mm	532mm	567mm
Seat Tube Angle	75.5°	74°	74°	73.5°	73.5°	73°

Manual Downloads

2021 Aethos User Manual

Specialized Bicycle Owner's Manual (All Languages)

Trainer Usage Addendum to the Bicycle Owner's Manual

Rider Reviews

3 Reviews

06/12/2022

My best bike ever

Got mine in January 2021, love it, love it, love it. After 10 years and over 120,000 miles of riding with different brands and models. This bike is for sure the best bike I ever owned. If you have the money go for it and enjoy

Would Recommend?: Yes!

Name:: SpeedyAldo

Helpful?

02/19/2021

â€¦oh yeah - it's light too

If you follow most the press and the forums and the other things on the interwebs people are talking a lot about the weight and then about the price - in alternating order. This is the most fun and I'd say ""best"" bike I've ever owned and it's not because it's light. The uniqueness is how it feels on the ride: Compliant without being soft â€” playful but not nervous â€” elegant but extremely fast. The ride quality is exceptional. The bike is extremely comfortable to ride and the compliance adds traction which makes it an extremely confident descender. You can feel that you have more grip. The crazy things is that the compliance does not make the bike sluggish or soft when accelerating. The opposite: Putting down power almost feels like loading a spring that catapults you forward within milliseconds. I've ridden the bike with different wheel sets and can attribute this behavior clearly to the frame. The handling is quick but not nervous. The Geometry is essentially identical with the tarmac. This is NOT an endurance bike. It wants to go fast! And lastly: The bike is so much fun to ride. It feels light and elegant and quick and playful and is just a joy. â€¦oh yeah - it's light too. All things considered the Tarmac is probably the faster bike (I've ridden the same climb on both bikes) and time and power were < 1% over 20 minutes and the Tarmac is more aero on the flat. But the Aethos is definitely more fun!

Name:: Cycle J.

Helpful?

10/08/2020

GREAT DEAL

you could be enjoying this bike to the fullest on some freshly paved mountain road or enjoying EIGHTY-FOUR THOUSAND CHICKEN NUGGETS for the same price. overall amazing

Name:: Kahlil K.

Helpful?