The Specialized S-Works Aethos Disc Road Bike is the culmination of several years of development, the aim being to create the perfect bike and this Founders Edition model is just that. Not focussed on racing, the FACT 12r carbon layup has been altered and the tubes subtly reshaped to bring the highest levels of stiffness, balance, strength and stability, all while minimising the material used. A result is a machine that breaks all the rules, sitting below the UCI weight limit at an incredible 5.9kg in a size 56, with the frame coming in at a mere 588 grams, and it's set to take road bikes in a completely new direction. The geometry and fit are exactly the same as that of the Tarmac SL7, providing an aggressive and racy feel, while Rider-First Engineered™ design keeps every frame size delivering equal performance and handling benefits.

This frameset can only be paired with electronic groupsets and is built up here with Shimano's flagship offering, Dura-Ace Di2, in a mid-compact configuration with a dual-sided crank-based power meter included. Shifting is fast, precise and smooth at just a light touch of the lever and the addition of the CeramicSpeed bottom bracket and pulley wheels lowers drivetrain friction markedly. When you need to stop fast, the hydraulic discs, also of the Shimano Dura-Ace marque, are just as capable in wet and dry conditions bestowing confidence on any descent or through any sharp corners.

SPECIFICATIONS:
Frame: Specialized S-Works Aethos FACT 12r Carbon, Rider-First Engineered™, 68mm BSA threaded BB, electronic cable routing only, 12x142mm thru-axle, flat-mount disc
Fork: Specialized S-Works FACT Carbon, 12x100mm thru-axle, flat-mount disc
Bottom Bracket: CeramicSpeed, 68mm BSA, Shimano HollowTech 2 axle compatible
Stem: Roval Alpinist Cockpit, one-piece bar/stem combination, carbon
Handlebar: Roval Alpinist Cockpit, one-piece bar/stem combination, carbon
Bar Tape: Supacaz Super Sticky Kush
Front Brake: Shimano Dura-Ace R9170, hydraulic disc
Rear Brake: Shimano Dura-Ace R9170, hydraulic disc
Brake Levers: Shimano Dura-Ace R9170
Front Derailleur: Shimano Dura-Ace Di2 R9150, braze-on
Rear Derailleur: Shimano Dura-Ace Di2 R9150, 11-speed, CeramicSpeed pulley wheels
Shift Levers: Shimano Dura-Ace Di2 Disc R9170
Chain: Shimano Dura-Ace, 11-speed
Cassette: Shimano Dura-Ace CS-R9100, 11-30t, 11-speed
Crankset: Shimano Dura-Ace R9100, HollowTech 2, 11-speed, dual-sided power meter, 52/36T
Front Wheel: Roval Alpinist CLX, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, Roval AFD hub, 21h, DT Swiss Aerolite spokes
Rear Wheel: Roval Alpinist CLX, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, Roval AFD hub, 24h, DT Swiss Aerolite spokes
Front Tyre: Specialized Turbo Cotton - Black Sidewall, 320 TPI, 700x26mm, clincher
Rear Tyre: Specialized Turbo Cotton - Black Sidewall, 320 TPI, 700x26mm, clincher
Saddle: Specialized Body Geometry S-Works Power Arc, carbon fibre rails, carbon fibre base
Seatpost: Roval Alpinist carbon seatpost
Pedals: Available to be purchased separately
Accessories: SWAT integrated cycle computer mount
Manufacturer Claimed Weight: 585 grams, frame only, size 56cm / 5.9kg, full bike build