Specialized Aethos 2 Expert / Shimano Ultegra Di2 (2026)

Break the Rules

With a 705g frame, the Aethos 2 is the lightest bike in its class. But weight was never the point. Built by breaking racing’s rules to deliver pure road riding bliss, it’s engineered to disappear beneath you: responsive, supple, and sublime. Now with increased tire clearance, refined components, and data-based fit-enhancing geometry, it brings that transcendent ride feel to more riders than ever. Aethos 2 breaks the rules, for the love of the ride.

At a Glance:-

Use:- Performance Road Riding

Frameset:- 705g FACT 10r Frame / FACT 10r Fork

Fit:- Performance Endurance

Cockpit & Wheels:- Roval Alpinist bar, Pro SL stem, C38 wheels

Drivetrain:- Shimano Ultegra Di2

Weight:- 7.12kg (56cm)

Specifications:-

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

Handlebars:- Roval Alpinist Carbon Handlebar, 125mm drop, 75mm reach

Stem:- Specialized Pro SL, alloy, 4-bolt

Tape:- Supacaz Super Sticky Kush

Saddle:- Body Geometry Power Expert

Seat Post:- Roval Alpinist Carbon

Front/Rear Brakes:- Shimano Ultegra BR-R8170 Hydraulic Brake

Shift Levers:- Shimano Ultegra Di2 R8170, hydraulic disc

Front Derailleur:- Shimano Ultegra Di2 R8150, braze-on

Rear Derailleur:- Shimano Ultegra Di2 R8150, 12-speed

Crankset:- Shimano Ultegra R8100, 52/36t

Bottom Bracket:- Shimano Threaded BSA BB

Cassette:- Shimano Ultegra, 12-speed, 11-30t

Chain:- Shimano XT CN-M8100, 12-speed

Wheelset:- Roval C38, 21mm internal width carbon rim

Inner Tubes:- 700x20-28, 48mm Presta Valve

Tyres:- S-Works Turbo, 700x28c

Weight:- 7.12 kg (56cm), Tubeless