Specialized Aethos 2 Expert Ultegra Di2 road bike in Dolomite Metallic/Shadow Silver, view 1
Specialized Aethos 2 Expert Ultegra Di2 road bike in Dolomite Metallic/Shadow Silver, view 2
Specialized Aethos 2 Expert Ultegra Di2 road bike in Dolomite Metallic/Shadow Silver, view 3
Specialized Aethos 2 Expert Ultegra Di2 road bike in Dolomite Metallic/Shadow Silver, view 4
Specialized Aethos 2 Expert Ultegra Di2 road bike in Dolomite Metallic/Shadow Silver, view 5
Specialized Aethos 2 Expert Ultegra Di2 road bike in Dolomite Metallic/Shadow Silver, view 6
Specialized Aethos 2 Expert Ultegra Di2 road bike in Dolomite Metallic/Shadow Silver, view 1
Specialized Aethos 2 Expert Ultegra Di2 road bike in Dolomite Metallic/Shadow Silver, view 2
Specialized Aethos 2 Expert Ultegra Di2 road bike in Dolomite Metallic/Shadow Silver, view 3
Specialized Aethos 2 Expert Ultegra Di2 road bike in Dolomite Metallic/Shadow Silver, view 4
Specialized Aethos 2 Expert Ultegra Di2 road bike in Dolomite Metallic/Shadow Silver, view 5
Specialized Aethos 2 Expert Ultegra Di2 road bike in Dolomite Metallic/Shadow Silver, view 6

Specialized Aethos 2 Expert – Shimano Ultegra Di2 (2027)

97227-3249

£5,499.00
/
Tax included.

This bike is available through the Cycle to Work Scheme

Frame Size
Color

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  • Questions on size or spec? Call 01625 403803 or visit us at 48a London Road, Alderley Edge
  • Sized properly: book a bike fit in our Alderley Edge studio
  • Not in the shop? Supplier stock reaches us in 4–5 days, then we post it or it's ready to collect
  • 30-day returns (custom builds excluded)
  • ★★★★★ 150+ five-star Google reviews

With a 705g FACT 10r carbon frame, the Aethos 2 is the lightest bike in its class – but weight was never the whole point. It was built by breaking racing's rules to deliver pure road-riding joy, and it's engineered to disappear beneath you: responsive, supple and sublime.

The Expert build pairs Shimano Ultegra Di2 electronic shifting with Roval C38 carbon wheels, a Roval Alpinist carbon bar and 30mm S-Works Turbo tyres. With its Performance Endurance fit and room for 35mm tyres, it's a superb all-rounder at 7.27kg (size 56).

Highlights

  • Aethos 2 FACT 10r carbon frame, 705g, Rider-First Engineered
  • Shimano Ultegra Di2 2x12
  • Roval C38 carbon tubeless-ready wheels with 30mm S-Works Turbo tyres
  • Roval Alpinist carbon handlebar and alloy stem
  • Clearance for 35mm tyres
  • 7.27kg, size 56

Sizes and fit

Available in 49cm, 52cm, 54cm, 56cm, 58cm and 61cm.

Colours

Dolomite Metallic / Shadow Silver.

Frameset
  • Frame: Aethos 2 FACT 10r Carbon, Rider First Engineered, threaded BB, hidden cable routing, 12x142mm thru-axle, flat-mount disc
  • Fork: Aethos 2 FACT 10r Carbon, 12x100mm thru-axle, flat-mount disc
Drivetrain
  • Shift levers: Shimano Ultegra Di2 R8170, hydraulic disc
  • Front derailleur: Shimano Ultegra Di2 R8150, braze-on
  • Rear derailleur: Shimano Ultegra Di2 R8150, 12-speed
  • Cassette: Shimano Ultegra, 12-speed, 11-30t
  • Chain: Shimano XT CN-M8100, 12-speed
  • Crankset: Shimano Ultegra R8100, 52/36t
  • Bottom bracket: Shimano threaded BSA
  • Brakes: Shimano Ultegra BR-R8170, hydraulic disc
Wheels and tyres
  • Wheels: Roval C38, 21mm internal width carbon rim, tubeless ready
  • Tyres: S-Works Turbo, 700x30
  • Inner tubes: 700x28-38mm, 48mm Presta valve
Cockpit and contact points
  • Stem: Roval Alpinist, alloy, 4 bolt, -6 degrees
  • Handlebars: Roval Alpinist Carbon, 125mm drop, 75mm reach
  • Bar tape: Supacaz Super Sticky Kush
  • Saddle: Body Geometry Power Expert, hollow Ti rails
  • Seatpost: Roval Alpinist Carbon
  • Seat binder: Specialized alloy, 30mm
Weight
  • Weight: 7.27kg (size 56)
Specialized Aethos 2 geometry diagram
Size49cm52cm54cm56cm58cm61cm
Stack (mm)522538559580606627
Reach (mm)373377384391398404
Seat tube length (mm)450470490510535570
Top tube (effective) (mm)508526544557572584
Head tube length (mm)114128150169198218
Head tube angle (°)71.472.172.5737373.5
Seat tube angle (°)75.574.574747474
Chainstay length (mm)410410410410410410
BB drop (mm)76.576.5757573.573.5
BB height (mm)265.5265.5267267268.5268.5
Wheelbase (mm)97898199299810131020
Front centre (mm)581584594599614621
Fork length (mm)372372372372372372
Fork offset (mm)505050474747
Trail (mm)625855555552
Standover (mm)719737759779805834

Same frame geometry across S-Works (FACT 12r) and FACT 10r Aethos 2 models.

Free UK shipping available on all orders, excluding bikes, wheelsets and packages over 10kg in weight e.g. turbo trainers.

Specialized Aethos 2 – so light, it's a crime

So Light, It's a Crime

Aethos 2 is the lightest road bike in its class, thanks to Flow State Design. It started with a simple insight: frames 'breathe' under load, and that rhythm shows exactly how force moves through them.

Specialized fed that into its supercomputer and evolved the tubes into sculpted forms, where shape itself delivers stiffness. The result is a lighter frame and a more perfect ride.

Rider on a Specialized Aethos 2 in the mountains

Geometry and Fit, Perfected

Specialized refined the Aethos 2 geometry using data from more than 100,000 Body Geometry bike fits, creating a Performance Endurance position that works for more riders than ever.

Climb faster, descend harder and ride longer, with precise handling in a more versatile, confidence-inspiring package.

Specialized Aethos 2 on a rough road with 35mm tyres

More Clearance, No Compromise

Aethos 2 clears 35mm tyres with ease, so you get smoother, faster rides, more grip and more roads to explore.

That kind of upgrade usually adds weight. Not here: with its most optimised layup yet and every detail re-engineered, no gram was safe from the Specialized Science Club.

Rider climbing on a Specialized Aethos 2

Built for the Love of the Ride

Aethos 2 was built by breaking racing's rules. Free from aero constraints, Specialized focused purely on ride feel: responsive, supple and sublime.

The result is a bike that disappears beneath you, whether you're chasing a climb, flowing down a descent or simply enjoying a long day out.

A perfect fit on the Specialized Aethos 2 Expert – Shimano Ultegra Di2 (2027)

Not sure what size you need? Want to ensure this Specialized Aethos 2 Expert – Shimano Ultegra Di2 (2027) fits perfectly from your first pedal stroke?

Book a free sizing appointment in the Fit Studio at Velo Edge.

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