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2024 Specialized

Aethos Expert

A carbon frame race bike with upper mid-range components and sram rival hydraulic disc brakes.
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Manufacturer Price

€6,500($7,563)
FrameCarbon
ForkCarbon
Wheels700c Carbon
Drivetrain2 × 12 Electronic
GroupsetRival AXS
Power MeterRival AXS
BrakesSRAM Rival Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Rider Position
relaxedaggressive
Terrain
smoothrugged
Aethos Expert
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

Aethos Expert

40 mph

Similar Bikes

Highest gear

(descending)

Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

Compare the full Aethos model range

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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 exceptionally lightweight frame and superb ride quality, offering a balanced and responsive experience that excels in climbing and handling. Its understated aesthetics and efficient chassis make it a standout in the race category, though some note limitations in wheel options and aerodynamics. Overall, it delivers a remarkable ride that prioritizes comfort and performance without excessive flair.

Pros
  • Exceptionally lightweight frame

  • Superb ride quality and handling

  • Understated aesthetics

  • Excellent climbing performance

  • Generous tire clearance

Cons
  • Limited wheel options

  • Lacks aero features

  • High price

  • Skittish on descents in some models

Key Quotes
The Aethos Comp, however, is much better when it comes to descending – the chassis is more composed and the front end transmits much less buzz, even with an alloy bar, budget wheels and skinny tyres.
BikeRadar logoBikeRadar
The Aethos is one of the finest-riding road frames I’ve ever experienced.
Cycling Tips logoCycling Tips
What a bike! If you have the cash and don't care about aero, buy it.
road.cc logoroad.cc
the Specialized Aethos is excellent, offers a truly remarkable ride and it doesn't like to shout about it
The Gear Loop

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Bicycling
Specialized Aethos 2 Stuns as Lightest Frame Again. The Latest Features Make It Even Better.

Oct 2025

Specialized’s Aethos 2 returns as the world’s lightest road frame, now with new upgrades that boost comfort, fit, and versatility for every cyclist.

Read Review

Bikerumor
Specialized Launches Aethos 2: The Everyday Superbike Gets a Refined Evolution

Oct 2025 · Jordan Villella

Get your wallet ready, the new Specialized Aethos 2 just dropped and it looks like more of the classic looks with some performance tweaks.

Read Review

Cycling News
New Specialized Aethos 2 review: The bike it should have been all along, but not everyone will be happy

Oct 2025

Still a featherweight, but now with relaxed geometry, internally routed cables, and premium builds only

Highs
  • Incredibly lightweight

  • Super nimble and fun to ride

  • Looks fantastic

Lows
  • Off-the-shelf tyre size is narrow, considering the clearance

  • Forced cockpit width is a headache customers shouldn't have to deal with

  • The Crux offers the same ride characteristics with more versatility

Read Review

Cyclist
Specialized S-Works Aethos 2 review: First ride on the brand’s updated climbing bike

Oct 2025 · Aaron Borrill

When Specialized unveiled the first-generation Aethos in 2020, it was an instant hit, perhaps only drawing flak from the rim-brake

Highs
  • Great ride quality

  • New geometry adds stability

  • 35mm tyre clearance

  • Front-end integration

  • Still very light

Lows
  • Expensive in S-Works guise

  • Non-aero

  • Limited range depth

Read Review

Escape Collective
Believe it or not … that is the new Specialized Aethos

Oct 2025 · Ronan Mc Laughlin

Specialized solves one pain point but makes a new one, as the second-generation Aethos adds weight but still clings to the “lightest road bike” crown.

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Velo
The Specialized S-Works Aethos Is Still Worth the Hype – Field Test

Jun 2025 · Josh Ross

Not an all-road and verging on relic status, but the passion behind Specialized S-Works Aethos continues to keep it relevant.

Read Review

road.cc
Tartan paint? Check out the very special Specialized S-Works Aethos that’s being ridden from Edinburgh to Rome this week

Mar 2024 · Mat Brett

Spoon Customs has created a stunning finish for a bike that’s being used to raise funds for the fight against motor neurone disease

Read Review

Gran Fondo Magazine
The Specialized Aethos Expert all-road bike in review

Aug 2022 · By

Our test team’s expectations of the Specialized Aethos Expert were very high. After all, the Specialized S-Works Aethos won our previous road bike group test by a large margin, albeit with a few upgrades. We put the stock Expert model featuring ULTEGRA Di2 components and a classic two-piece cockpit to the test to see if this model can fare just as well as an all-road bike, comparing it to six of this year’s best all-road models.

Highs
  • First-class handling

  • Quick acceleration

  • Pleasant level of vibration damping

  • Lots of all-round potential with the right upgrades

Lows
  • Tires are too skinny and offer limited reserves

  • Lack of integration

Read Review

Geometry
Specs
Build
Frame

Aethos FACT 10R Carbon, Rider First Engineered™, Threaded BB, 12x142mm thru-axle, flat-mount disc

BB StandardBSA, 68mm, Threaded

ColorsGloss Dune White / Metallic Obsidian; Satin Metallic Deep Lake / Deep Lake

Fork

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

Bottom Bracket

SRAM DUB BSA 68

Stem

Specialized Pro SL, alloy, 4-bolt

Handlebar

Specialized Expert Shallow Drop, alloy, 125mm drop x 75mm reach

Saddle

Body Geometry Power Expert

Seatpost

Roval Alpinist Carbon Seatpost

TypeRigid

Groupset
Rear Derailleur

SRAM Rival eTap AXS, 12-speed

Front Derailleur

SRAM Rival eTAP AXS, braze-on

Crank

SRAM Rival AXS Power Meter, 48/35T

Power Meter

SRAM Rival AXS Power Meter, 48/35T

Shifters

SRAM Rival eTap AXS

Cassette

SRAM Rival, 12-speed, 10-36t

Chain

SRAM Rival 12-speed

Brakes

Front: SRAM Rival eTAP AXS, hydraulic disc, Rear: SRAM Rival eTAP AXS, hydraulic disc

TypeSRAM Rival Hydraulic Disc

Wheels
Rims

Front: Roval C38, 21mm internal width carbon rim, Rear: Roval C38, 21mm internal width carbon rim

Tires

Front: S-Works Turbo, 120 TPI, folding bead, BlackBelt protection, 700x28mm, Rear: S-Works Turbo, 120 TPI, folding bead, BlackBelt protection, 700x28mm

Rider Notes
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First added May 22

Last updated October 30

Not listed for 947 days