Aethos 2 Expert Shimano Ultegra Di2
OverviewAbout the Specialized Aethos 2 Expert Shimano Ultegra Di2
The Specialized Aethos 2 Expert Shimano Ultegra Di2 is a road bike, built on a carbon frame, listed at $9,200. A drop-bar bike built for sealed roads, speed and distance.
SizingWhat size Aethos 2 Expert Shimano Ultegra Di2 do I need?
Enter your height to see the size we would start with.
| Size | Rider height | In feet |
|---|---|---|
| XS48 to 50 cm frame | 152 to 160 cm | 5 ft 0 in to 5 ft 3 in |
| S51 to 52 cm frame | 160 to 167 cm | 5 ft 3 in to 5 ft 6 in |
| M53 to 54 cm frame | 167 to 174 cm | 5 ft 6 in to 5 ft 9 in |
| ML55 to 56 cm frame | 174 to 181 cm | 5 ft 9 in to 5 ft 11 in |
| L57 to 58 cm frame | 181 to 188 cm | 5 ft 11 in to 6 ft 2 in |
| XL59 to 61 cm frame | 188 to 196 cm | 6 ft 2 in to 6 ft 5 in |
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
- $9,200, 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, 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 Brake
- Wheelset
- Roval C38, 21mm internal width carbon rim
- Rim internal width
- 21 mm
- Stock tyre
- 700x28c
- Fork material
- Carbon
- BB standard
- Shimano Threaded BSA BB
- Cockpit
- Specialized Pro SL, alloy, 4-bolt / Roval Alpinist Carbon Handlebar, 125mm drop, 75mm reach
- Saddle
- Body Geometry Power Expert
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 4221565 (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.
