Specialized S-Works Aethos Dura-Ace Di2

Name: Specialized S-Works Aethos Dura-Ace Di2
Brand: Specialized

2025 RoadRace Manufacturer page

Specialized S-Works Aethos Dura-Ace Di2, color Gloss Glacial Metallic / Red to Gold Pearl / Satin Silver Dust

Last known price: $11,499

Prices shown first for United States
Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 12 36–52t / 11–30t
Gear range: 394%
Weight: 6.29 kg 13.9 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

49cm 155–163
52cm 161–169
54cm 166–175
56cm 172–181
58cm 178–186
61cm 183–191

Components

16 of 17 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

S-Works Aethos FACT 12r Carbon, Rider First Engineered™, Threaded BB, Electronic cable routing only, 12x142mm thru-axle, flat-mount disc Not identified

Suspension

1 part

Fork
- S-Works

Drivetrain

8 parts

Brakes

1 part

Brakes
- Shimano Dura-Ace BR-R9200
BR-R9200

Wheels and tires

2 parts

Cockpit and contact points

4 parts

Sizes and geometry

6 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size 54cm

Table

Reach 384mm

Stack 544mm

Wheelbase 978mm

Head angle 73.0°

Seat angle 74.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 700c wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 6 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	375	380	384	395	402	408
Stackmm	514	527	544	565	591	612
Top tube lengthmm	508	531	540	562	577	595
Seat tube lengthmm	431	462	481	504	532	567
Head tube lengthmm	109	120	137	157	184	204
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 lengthmm	410	410	410	410	410	410
Wheelbasemm	973	975	978	991	1005	1012
Front centermm	574	577	579	591	606	613
Bottom bracket dropmm	74	74	72	72	72	72
Bottom bracket heightmm	266	266	268	268	268	268
Standover heightmm	705	728	748	769	796	824
Fork rakemm	47	47	44	44	44	44
Trailmm	58	55	55	52	63	58
Stack/reach ratio	1.37	1.39	1.42	1.43	1.47	1.50
Suspension and parts
Crank lengthmm	165	170	172.5	172.5	175	175
Handlebar widthmm	380	400	420	420	440	440
Stem lengthmm	80	90	100	100	110	110
Seatpost lengthmm	300	300	360	360	360	360

Not published by the manufacturer: Front travel, Rear travel, Stem angle and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon
Fork material: Carbon
Bicycle weight: 6.29 kg

13.9 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 36
Largest chainring: 52
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 30
Lowest gear: 34.8 in
Highest gear: 137.1 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Electronic

Additional specifications

Bottom bracket standard: BSA
Power meter: Shimano Dura-Ace R9200, HollowTech II, 12-speed with 4iiiis Dual PRECISION 3+ Pro Powermeter, with Apple Find My, 52/36T
Additional specification: Model display: Dura-Ace
Additional specification: Model id: dura-ace
Tire width: 28c
Wheel material: Carbon
Wheel size: 700c

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

34.8 gear inches

This value is above the central range for this class.

Cohort: Road / Race Model year: 2025
Sample: 762 bicycles with this information
Coverage: 78.1% of the class

Highest gear

137.1 gear inches

This value is within the central range for this class.

Cohort: Road / Race Model year: 2025
Sample: 762 bicycles with this information
Coverage: 78.1% of the class

Shifting

Electronic

643 of 969 bicycles with this information use electronic shifting.

Cohort: Road / Race Model year: 2025
Sample: 969 bicycles with this information
Coverage: 99.3% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 13.3 km/h
Highest gear: 52.5 km/h

Total gear range 394%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 34.8–137.1 gear inches
Class reference (p10–p90): 28.2–139.2 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Race Model year: 2025
Lowest gear: 762 bicycles with this information, 78.1% of the class
Highest gear: 762 bicycles with this information, 78.1% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2025 builds

Differences across 2025 builds
Specification	This bicycle Specialized S-Works Aethos Dura-Ace Di2	Specialized Aethos Comp Shimano 105 Di2	Specialized Aethos Expert Rival eTap AXS	Specialized Aethos Expert SRAM Rival eTap AXS	Specialized Aethos Pro Force eTap AXS	Specialized Aethos Pro Shimano Ultegra Di2
Frame
Bicycle weight	6.29 kg	7.5 kg	7.54 kg	7.54 kg	7.05 kg	6.78 kg
Drivetrain
Smallest chainring	36	34	35	35	35	36
Largest chainring	52	50	48	48	48	52
Smallest sprocket	11	11	10	10	10	11
Largest sprocket	30	34	36	36	33	30
Lowest gear	34.8 in	29.0 in	28.2 in	28.2 in	30.8 in	34.8 in
Highest gear	137.1 in	131.8 in	139.2 in	139.2 in	139.2 in	137.1 in
Other specifications
Power meter	Shimano Dura-Ace R9200, HollowTech II, 12-speed with 4iiiis Dual PRECISION 3+ Pro Powermeter, with Apple Find My, 52/36TAdditional specification: Model display: Dura-AceAdditional specification: Model id: dura-ace	Not informed	SRAM Rival DUB, Power Meter, 48-35t, 48/35tAdditional specification: Model display: Rival AXSAdditional specification: Model id: rival-axs	SRAM Rival DUB, Power Meter, 48-35t, 48/35tAdditional specification: Model display: Rival AXSAdditional specification: Model id: rival-axs	SRAM Force DUB, Power Meter, 48-35t, 48/35TAdditional specification: Model display: Force AXSAdditional specification: Model id: force-axs	Shimano Ultegra R8100 with 4iiiis Precision 3+ Power Meter, 52/36TAdditional specification: Model display: UltegraAdditional specification: Model id: ultegra
Wheel material	Carbon	Aluminum	Carbon	Carbon	Carbon	Carbon