Which size or configuration labels have geometry for the 2023 Specialized Aethos Expert?

Geometry is listed for 49, 52, 54, 56, 58, and 61.

What are the reach and stack of the 2023 Specialized Aethos Expert in size 56?

In size 56, reach is 395 mm and stack is 565 mm.

What is the head tube angle of the 2023 Specialized Aethos Expert?

The head tube angle is 73.5 degrees in size 56.

What does the 2023 Specialized Aethos Expert ship with?

The stock build includes Specialized Aethos FACT, SRAM Rival eTAP AXS, Roval C38, and SRAM Rival eTap AXS.

Which years of the Specialized Aethos are on Quiver?

Quiver has the Specialized Aethos for 2023, 2025, 2024, 2022, and 2021.

2023 Specialized Aethos Expert geometry and specs

Key facts

Brand: Specialized
Model: Aethos
Model year: 2023
Frame: Expert
Type: Road
Geometry labels: 49, 52, 54, 56, 58, and 61
Drivetrain: SRAM Rival eTAP AXS
Wheels: Roval C38
Geometry: Complete for every size
Source: specialized.com
Checked: Sep 5, 2026

Geometry by size

Geometry drawing, size 54, to scale.

2023 Specialized Aethos Expert geometry by size
Measurement	49	52	54	56	58	61
Reach(mm)	375	380	384	395	402	408
Stack(mm)	514	527	544	565	591	612
Head tube angle(°)	71.75	72.5	73	73.5	73.5	74
Seat tube angle(°)	75.5	74	74	73.5	73.5	73
Chainstay length(mm)	410	410	410	410	410	410
Wheelbase(mm)	973	975	978	991	1005	1012
BB drop(mm)	74	74	72	72	72	72
BB height(mm)	266	266	268	268	268	268
Standover(mm)	705	728	748	769	796	824
Seat tube length(mm)	431	462	481	504	532	567
Fork length(mm)	369	369	369	369	369	369
Head tube length(mm)	109	120	137	157	184	204

How to read a geometry chart

Stock build

12 parts

Frame

Specialized Aethos FACT

Frame

Drivetrain

SRAM Rival eTAP AXS

ShifterSpeeds 12Actuation type Electronic

SRAM Rival eTAP AXS

Derailleur

SRAM Rival

Cassette

SRAM Rival

Chain

SRAM Rival AXS Power Meter

Crankset

SRAM DUB

Bottom bracket

Wheels & Tires

Roval C38

Wheelset

Specialized S-Works Turbo

TireCompound GRIPTONTPI 120 TPINot tubeless readyWeight ~220 g

Brakes

SRAM Rival eTap AXS

Brake

Seatpost & Saddle

Roval Alpinist

Seatpost

Specialized Power Expert

SaddleWeight ~235 g

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Quick answers

Which size or configuration labels have geometry for the 2023 Specialized Aethos Expert?: Geometry is listed for 49, 52, 54, 56, 58, and 61.
What are the reach and stack of the 2023 Specialized Aethos Expert in size 56?: In size 56, reach is 395 mm and stack is 565 mm.
What is the head tube angle of the 2023 Specialized Aethos Expert?: The head tube angle is 73.5 degrees in size 56.
What does the 2023 Specialized Aethos Expert ship with?: The stock build includes Specialized Aethos FACT, SRAM Rival eTAP AXS, Roval C38, and SRAM Rival eTap AXS.
Which years of the Specialized Aethos are on Quiver?: Quiver has the Specialized Aethos for 2023, 2025, 2024, 2022, and 2021.