Aethos 2 Pro
OverviewAbout the Specialized Aethos 2 Pro
The Specialized Aethos 2 Pro is a road bike, built on a carbon frame, listed at $12,000. A drop-bar bike built for sealed roads, speed and distance.
SizingWhat size Aethos 2 Pro do I need?
Enter your height to see the size Specialized recommends.
| Size | Rider height | In feet |
|---|---|---|
| 49 | 155 to 163 cm | 5 ft 1 in to 5 ft 4 in |
| 52 | 163 to 170 cm | 5 ft 4 in to 5 ft 7 in |
| 54 | 170 to 175 cm | 5 ft 7 in to 5 ft 9 in |
| 56 | 175 to 180 cm | 5 ft 9 in to 5 ft 11 in |
| 58 | 180 to 188 cm | 5 ft 11 in to 6 ft 2 in |
| 61 | 188 to 196 cm | 6 ft 2 in to 6 ft 5 in |
Rider heights from Specialized's size chart. Height is a starting point: arm and leg length, flexibility and riding style all matter, so a test ride beats any chart. How bike sizing works.
SpecificationsWhat we know
- Brand
- Specialized
- Model year
- 2026
- Category
- Road
- Frame
- Carbon
- Wheel size
- 700c
- Drivetrain
- Shimano Ultegra Di2 2x12
- Brakes
- Disc
- Frame sizes
- 49, 52, 54, 56, 58, 61
- Price
- $12,000, RRP AUD (Specialized Australia, checked 17 Oct 2026)
Specs and pricing are listed in AUD and sourced from Australian retail listings. Confirm the current details and availability with the seller before purchase.
GeometrySize 56
- Stack
- 580 mm
- Reach
- 391 mm
- Stack/reach
- 1.48
- Head angle
- 73 deg
- Seat angle
- 74 deg
- Wheelbase
- 998 mm
- Chainstay
- 410 mm
- BB drop
- 75 mm
- Standover
- 779 mm
- Fork rake
- 47 mm
GearingRatios
Ratios are derived from the chainrings and cassette. They describe the gearing, not any rider's ability.
Drivetrain & buildFull specification
- Groupset
- Shimano Ultegra Di2
- Shifting
- Electronic
- Drive
- 2x
- Speeds
- 12
- Crank
- Shimano Ultegra R8100 with 4iiii Precision 3+ single-sided Power Meter, 52/36t
- Chainrings
- 52/36
- Cassette
- Shimano Ultegra, 12-speed, 11-30t
- Rear derailleur
- Shimano Ultegra Di2 R8150, 12-speed
- Brakes
- Shimano Ultegra BR-R8170, hydraulic disc
- Rotors
- 160/140mm
- Wheelset
- Roval Alpinist CL II, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes, Tubeless Ready
- Rim internal width
- 21 mm
- Stock tyre
- 700x28c
- Max tyre clearance
- 32 mm
- Tubeless
- Yes
- Fork material
- Carbon
- BB standard
- Shimano Threaded BSA BB
- Thru-axle
- 100x12mm front, 142x12mm rear
- Seatpost
- Roval Alpinist carbon
- Cockpit
- Roval Alpinist Cockpit II, Integrated Bar/Stem
- Saddle
- Power Pro Mirror, Hollow Ti rails
Bike DNAWhat the numbers say
- Position
- Stack-to-reach 1.48 gives a balanced, endurance riding position.
- Steering
- A 73 deg head angle points to balanced steering.
- Climbing
- Lowest ratio 1.2 is endurance-friendly gearing.
Derived from the published geometry and gearing above. It describes the numbers, not a ride test.
BikeFinder Data Profile: geometry and specification researched from published sources (Specialized Australia product page 4279155 (spec list and geometry chart)), verified 2026-10-17. This is a specification analysis, not a physical ride review.
Where to buyStockist
BikeFinder is an independent directory. We link to retailers; prices and stock are set by the seller and shown as at the date checked.
