Specialized Aethos Pro Shimano Ultegra Di2

Name: Specialized Aethos Pro Shimano Ultegra Di2
Brand: Specialized

2023 RoadRace Manufacturer page

Specialized Aethos Pro Shimano Ultegra Di2, color Satin Obsidian / Chaos Pearl Granite/birch

Last known price: $7,999

Prices shown first for United States
Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 12 36–52t / 11–30t
Gear range: 394%
Weight: 6.93 kg 15.3 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

14 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

Aethos FACT 10R Carbon, Rider First Engineered™, Threaded BB, 12x142mm thru-axle, flat-mount disc Not identified

Suspension

1 part

Fork

FACT Carbon, 12x100mm thru-axle, flat-mount disc Not identified

Drivetrain

8 parts

Brakes

1 part

Brakes
- Shimano Ultegra BR-R8170
BR-R8170

Wheels and tires

2 parts

Cockpit and contact points

4 parts

Handlebar
- S-Works
Saddle

Body Geometry Power Pro, hollow titanium rails Not identified
Seatpost
- Roval
Stem
- Specialized

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	63	58	58	55	55	52
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: 6.93 kg

15.3 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 Ultegra R81000 with 4iiiis Power Meter, 52/36T
Additional specification: Model display: Ultegra
Additional specification: Model id: ultegra
Tire width: 28c
Wheel material: Carbon
Wheel size: 700c

Technical analysis

1 measure

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

Shifting

Electronic

733 of 1,254 bicycles with this information use electronic shifting.

Cohort: Road / Race Model year: 2023
Sample: 1,254 bicycles with this information
Coverage: 100.0% 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

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 2023 builds

Differences across 2023 builds
Specification	This bicycle Specialized Aethos Pro Shimano Ultegra Di2	Specialized Aethos Comp Rival eTap AXS	Specialized Aethos Comp Shimano 105 Di2	Specialized Aethos Expert	Specialized Aethos Expert SRAM Rival eTap AXS	Specialized Aethos Pro SRAM Force eTap AXS
Frame
Bicycle weight	6.93 kg	Not informed	7.68 kg	7.64 kg	7.64 kg	Not informed
Drivetrain
Smallest chainring	36	35	32	35	Not informed	35
Largest chainring	52	48	32	48	Not informed	48
Smallest sprocket	11	10	11	10	10	10
Largest sprocket	30	36	34	36	36	33
Lowest gear	34.8 in	28.2 in	27.3 in	28.2 in	Not informed	30.8 in
Highest gear	137.1 in	139.2 in	84.4 in	139.2 in	Not informed	139.2 in
Other specifications
Power meter	Shimano Ultegra R81000 with 4iiiis Power Meter, 52/36TAdditional specification: Model display: UltegraAdditional specification: Model id: ultegra	Not informed	Not informed	SRAM Rival AXS Power Meter, 48/35TAdditional specification: Model display: Rival AXSAdditional specification: Model id: rival-axs	Not informed	SRAM Force AXS Power Meter, 48/35TAdditional specification: Model display: Force AXSAdditional specification: Model id: force-axs
Tire width	28c	26c	28c	28c	28c	26c
Wheel material	Carbon	Aluminum	Aluminum	Carbon	Not informed	Carbon