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2021 Specialized

S-Works Aethos - Founder's Edition

A carbon frame race bike with ultra high-end components and shimano dura-ace hydraulic disc brakes.
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Manufacturer Price

$14,500
FrameCarbon
ForkCarbon
Wheels700c Carbon
Drivetrain2 × 11 Electronic
GroupsetDura-Ace Di2
Power MeterDura-Ace
BrakesShimano Dura-Ace Hydraulic Disc
Where to Buy
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Insights
Ride Feel

Based on frame geometry and build specs.

Rider Position
relaxedaggressive
Terrain
smoothrugged
S-Works Aethos - Founder's Edition
Other Race bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

41 mph

S-Works Aethos - Founder's Edition

40 mph

Similar Bikes

Highest gear

(descending)

Sizing
49cm

5'1" – 5'5"

52cm

5'3" – 5'7"

54cm

5'5" – 5'9"

56cm

5'7" – 6'0"

58cm

5'10" – 6'2"

61cm

6'0" – 6'4"

🐐 Estimated

Rider Fit Notes
  • 5'11", size 56cm, Just right
  • 6'1", size 61cm, Just right
Reviews

Summary

The Specialized Aethos is celebrated for its exceptional lightweight design, superb ride quality, and precise handling, making it a standout in the race category. Its frame, one of the lightest available, offers a perfect balance of stiffness and comfort, excelling in climbing and descending. While it boasts understated aesthetics and high-performance features, some reviews note limitations like non-tubeless wheels and a high price point.

Pros
  • One of the lightest frames available, enhancing climbing performance

  • Superb ride quality with a perfect balance of stiffness and comfort

  • Precise and intuitive handling, excellent for both climbing and descending

  • Understated aesthetics with high-performance features

  • Generous tire clearance and traditional standards for ease of maintenance

Cons
  • Non-tubeless wheels and tires limit potential

  • High price point may deter some buyers

  • Limited to electronic groupsets, restricting customization options

  • Some models may feel too twitchy for certain riders

Key Quotes
This $4,800, 17.2-pound Aethos—the base model—is one of the finest road bikes, of any price, I’ve ridden in my long testing career.
Bicycling
Much like an iPhone, it appears sleek and minimal on the outside, but with incredible technology and performance hiding inside.
Bikerumor logoBikerumor
The Aethos is crazy light.
Canadian Cycling Magazine logoCanadian Cycling Magazine
It’s one of a small number of test bikes I’ve missed since the day I handed it back.
Cycling Tips logoCycling Tips
The result is the new Specialized Aethos. A concept that goes against the status quo and may revolutionise how bikes are designed and built in the future.
Cycling News logoCycling News

Feedback?

View all reviews

The Gear Loop
Specialized S-Works Aethos review

Dec 2021 · Leon Poultney

We spend time with Specialized's latest lightweight, high-performance road bike that seemingly excels in all areas.

Highs
  • Climbs like a champion

  • Impossibly light

  • Stylish

  • Effortless to ride

Lows
  • The price

  • Looks better in rowdier colours

  • Limited wheel options

  • Lacks aero touches some might demand

Read Review

Road Bike Action
SPECIALIZED S-WORKS AETHOS VS. OPEN CYCLE MIN.D. - Road Bike Action

Sep 2021 · David Kennedy

When you stop listening to the pros and focus on the people, bikes like the Open MIN.D. and Specialized Aethos are the result

Read Review

Cyclist
Specialized S-Works Aethos review

May 2021 · James Spender

The Aethos is virtually the perfect bike, from its razor handling to incredible climbing. If only it had tubeless wheels and cost a bit less

Highs
  • Light and stiff

  • Incredible climber

  • Fantastic handling

Lows
  • Clincher-only wheels

Read Review

Gran Fondo Magazine
The Specialized S-Works Aethos in review

Apr 2021 · Benjamin Topf

Hardly any aerodynamic features, cable integration or even mounting points, other than for two bottles: the list of things that the Specialized S-Works Aethos doesn't have is long. Does this reductionist concept work during the test or does this bike not stand a chance against the competition? Find out here.

Highs
  • Balanced and intuitive handling

  • Most light-footed and willing acceleration in the test

  • Minimal weight without the usual disadvantages

  • High level of comfort

Lows
  • Average efficiency on the flats

  • Limited mounting point

Read Review

Bicycling
Specialized’s Aethos Comp Rival eTap AXS Is So Good, It’ll Scramble Your Brain

Apr 2021 · Matt Phillips

It sells for $4,800, but it rides like a million bucks.

Read Review

road.cc
Specialized Aethos Pro Ultegra Di2

Dec 2020 · Liam Cahill

What a bike. If you have the cash and don't care about aero, buy it

Highs
  • Incredible ride

  • Low weight

  • Excellent stiffness

  • Perfect handling

  • Gets most of the tech from the S-Works

Lows
  • No power meter

  • Expensive

Read Review

Bikerumor
Specialized Aethos adds more affordable Pro & Expert models, still sub-700g

Oct 2020 · Tyler Benedict

The earth-shatteringly lightweight Specialized Aethos has very quickly added two new models. They’re more affordable, and they’re both still really light. The Aethos Pro and Aethos Expert road bikes share the same new molds and tube shapes, but use a slightly more standard layup to bring prices starting at less than half of the S-Works’ […]

Read Review

BikeRadar
Specialized S-Works Aethos Dura-Ace Di2 review

Oct 2020 · George Scott

Aero is everything, except where the Aethos is concerned

Highs
  • Exceptionally light frame, pin-sharp handling, 32mm tyre clearance, practical build for everyday riding

Lows
  • No tubeless compatibility, minimum £10k pricing

Read Review

Geometry
Specs
Build
Frame

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

BB StandardBSA, 68mm, Threaded

ColorSatin Brushed Liquid Silver / Holographic

Fork

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

Bottom Bracket

Shimano Dura-Ace, BB-R9100

Handlebar

Roval Alpinist Cockpit, one-piece bar/stem combo, carbon

Saddle

Body Geometry S-Works Romin Evo, Carbon Fiber Rails, Carbon Fiber Base

Seatpost

Roval Alpinist Carbon Seatpost

TypeRigid

Groupset
Rear Derailleur

Shimano Dura-Ace Di2 R9150, 11-speed

Front Derailleur

Shimano Dura-Ace Di2 R9150, braze-on

Crank

Shimano Dura-Ace R9100, HollowTech 2, 11-speed, Dual-sided Powermeter, 52/36T

Power Meter

Shimano Dura-Ace R9100, HollowTech 2, 11-speed, Dual-sided Powermeter, 52/36T

Shifters

Shimano Dura-Ace R9170, hydraulic disc

Cassette

Shimano Dura-Ace R9100, 11-speed, 11-30t

Chain

Shimano Dura-Ace, 11-speed

Brakes

Front: Shimano Dura-Ace R9170, hydraulic disc, Rear: Shimano Dura-Ace R9170, hydraulic disc

TypeShimano Dura-Ace Hydraulic Disc

Wheels
Rims

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

Tires

Front: Turbo Cotton - Black Sidewall, 320 TPI, 700x26mm, Rear: Turbo Cotton - Black Sidewall, 320 TPI, 700x26mm

Rider Notes
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First added March 26

Last updated June 11

Not listed for 738 days