Product Info
Details + Specs
Aethos 2 Expert - Shimano Ultegra Di2
Pure road performance
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.
Best for: Lightweight road performance, climbing and all-day premium road riding.
At a glance
Frame
Aethos 2 FACT 10r Carbon, Rider First Engineered™, threaded BB, hidden…
Drivetrain
Shimano Ultegra Di2 RD-R8150, 12-speed
Wheels
Roval C38, 21mm internal width carbon, tubeless ready
Cockpit
Roval Alpinist Carbon, 125mm drop x 75mm reach
Brakes
Shimano Ultegra BR-R8170, hydraulic disc
Weight
7.12 kg / 15lb 11.2oz (size 56)
Key highlights
just 705 grams (size 56), among the lightest production road frames available, without sacrificing the stiffness and durability needed for everyday racing and riding.
crisp, reliable shifts and hydraulic disc braking from one of road cycling's most trusted groupsets.
38mm-deep, tubeless-ready wheels that balance aerodynamics with everyday climbing efficiency.
Roval Alpinist carbon handlebar and a Specialized Pro SL alloy stem for a stiff, precise front end.
Complete specification
Full build details
Components are grouped by bike system so the complete build is easy to scan.
Frameset
Frame
Aethos 2 FACT 10r Carbon, Rider First Engineered™, threaded BB, hidden cable routing, 12x142mm thru-axle, flat-mount disc (705g, size 56)
Suspension
Fork
Aethos 2 FACT 10r Carbon, 12x100mm thru-axle, flat-mount disc
Brakes
Front Brake
Shimano Ultegra BR-R8170, hydraulic disc
Rear Brake
Shimano Ultegra BR-R8170, hydraulic disc
Drivetrain
Shift Levers
Shimano Ultegra Di2 ST-R8170, hydraulic disc
Rear Derailleur
Shimano Ultegra Di2 RD-R8150, 12-speed
Cassette
Shimano Ultegra CS-R8100, 12-speed, 11-30t
Chain
Shimano XT CN-M8100, 12-speed
Crankset
Shimano Ultegra FC-R8100, 52/36t
Bottom Bracket
Shimano, threaded BSA
Wheels and tyres
Front Wheel
Roval C38, 21mm internal width carbon, tubeless ready
Rear Wheel
Roval C38, 21mm internal width carbon, tubeless ready
Tyres
S-Works Turbo, 700x28c
Cockpit and contact points
Handlebars
Roval Alpinist Carbon, 125mm drop x 75mm reach
Stem
Specialized Pro SL, alloy, 4-bolt
Seatpost
Roval Alpinist Carbon
Saddle
Body Geometry Power Expert
Weight and sizing
Weight
7.12 kg / 15lb 11.2oz (size 56)
Weight is based on a production painted bike in the stated reference size. Actual weight can vary with colour, size and component variation. Specifications are subject to change without notice.