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Specialized Sigma Exclusive S-Works Aethos Disc Road Bike - 54cm

RRP £15,500.00 Save 25%

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Product ID: 1673156

Specialized Sigma Exclusive S-Works Aethos Disc Road Bike 2023 - 54cm

Rather than being designed to win races, the Specialized S-Works Aethos Disc Road Bike concentrates on offering a rich blend of ride feel, super low weight and bags of style to ensure every ride is fast, controlled and inspiring. This Sigma exclusive build has had every component selected in-store and it's been built up to bring the finest brands together, creating a beautiful bike. 

The frame shuns the harsh lines of aerodynamic kinks and bends and replaces them with traditional round tube sections that ooze class and style. The conventional round tube shape offers the best foundations for increasing stiffness and lowering weight, and when combined with Specialized's finest FACT 12r carbon and a refined layup schedule, a remarkable frame weight of 585 grams (size 56) and superb lateral stiffness is achieved. Moreover, the frame's sophisticated configuration balances this lateral stiffness with vertical compliance across its front and rear, leading to a heightened sensation of balance and poise.

Naturally, the S-Works Aethos scampers eagerly up the most brutal climbs, but this altitude consuming velocity is heightened further by the low rotational weight issued by the Roval Alpinist CLX wheelset and its lightweight full carbon rims. Generous clearance offered by the frameset allows these wheels to be dressed in up to 32mm wide tyres for extra plushness over harsh roads, while a frame geometry borrowed from the brand's Tarmac SL7 race bike positions the rider powerfully over the drivetrain. Supplied with narrower Turbo Cottons in 24mm, a rider and racer favourite, the suppleness and ride feel is unmatched.

A Shimano Dura-Ace R9200 12-speed setup delivers fast, precise gear changes via its semi-wireless electronic format, even when the rider is stomping unapologetically on the pedals. Hydraulic disc brakes deliver confidence-inspiring stopping power and control, even in the wet. 

Handlebar, stem and saddle come courtesy of Tune, creating a sleek aesthetic and the performance attributes to match.

Read more about the bikes in our Specialized S-Works Aethos article.


  • A superlight steed that blends ultimate ride feel, a super low weight and style
  • The frame utilises a sophisticated layup of FACT 12r carbon to deliver exceptional lateral stiffness and a weight of just 585 grams (size 56)
  • Traditional round tube shapes are subtly altered to further improve stiffness and balance while markedly improving durability
  • The round tube shapes offer a classic aesthetic that oozes style
  • A perfect balance of lateral stiffness and vertical compliance from front to rear guarantees exceptional ride quality and control
  • Minimalist derailleur hangers and fork expander plug are small details that further shed grams
  • A race-inspired geometry positions the rider powerfully over the pedals and affords accurate descending
  • Clearance for up to 32mm wide tyres offers the opportunity of extra compliance and grip on poor roads
  • Roval Alpinist CLX wheels ensure low rotating mass for lightning acceleration and consistent climbing speeds
  • Shimano Dura-Ace R9100 12-speed, semi-wireless electronic gears shift flawlessly amongst a wide range of ratios
  • Hydraulic disc brakes stop with power and control in all weather conditions

Technical Specification

Frame Specialized S-Works Aethos FACT 12r Carbon, Rider First Engineered™, BSA threaded bottom bracket, Electronic cable routing only, 12x142mm thru-axle, flat-mount disc, Campagnolo Winged Wheel top cap
Fork Specialized S-Works FACT Carbon, 12x100mm thru-axle, flat-mount disc
Bottom Bracket BSA30 Coated Ceramic
Stem Tune Geiles Teil 4.0 OV Stem (120mm)
Handlebar Tune Geweih Handlebar (42cm)
Bar Tape Supacaz Super Sticky Kush
Front Brake Shimano Dura-Ace R9270, hydraulic disc / RT-MT900 Ice Tech FREEZA Center Lock Disc Brake Rotor 160mm
Rear Brake Shimano Dura-Ace R9270, hydraulic disc / RT-MT900 Ice Tech FREEZA Center Lock Disc Brake Rotor 160mm
Brake Levers Shimano Dura-Ace R9270, hydraulic
Front Derailleur Shimano Dura-Ace Di2 R9250, braze-on
Rear Derailleur Shimano Dura-Ace Di2 R9250, 12-speed
Shift Levers Shimano Dura-Ace R9270, hydraulic disc
Chain Shimano M9100 XTR and Dura-Ace, 12-speed
Cassette Shimano Dura-Ace R2900, 12-speed, 11-30t
Crankset Cane Creek eeWings All-Road Titanium Cranks (172.5mm) / Praxis Works Buzz Road Chainrings 110BCD (50/34) / Cane Creek eeWings Crank Spider - 2x Sub Compact
Front Wheel Princeton CarbonWorks PEAK 4550 Tune Carbon Disc Wheelset (Shimano/SRAM)
Rear Wheel Princeton CarbonWorks PEAK 4550 Tune Carbon Disc Wheelset (Shimano/SRAM)
Front Tyre Specialized Turbo Cotton, 320 TPI, 700x24mm, clincher
Rear Tyre Specialized Turbo Cotton, 320 TPI, 700x24mm, clincher
Saddle Tune Komm-Vor+ Carbon Saddle with Alcantara cover
Seatpost Roval Alpinist Carbon Seatpost (27.2 x 300mm)
Pedals Available to be purchased separately
Accessories Porteur Stem Mount for GPS Cycling Computer / Tune Wasserträger 2.0 Bottle Cage

Built, Checked, Tuned and Tested

All our bikes are fully built, checked, tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for delivery. All you have to do is add the pedals (if included), attach the handlebars to the stem and tighten them following the included detailed instructions or by watching our video and using the provided FREE tools. Visit our Bike Assembly page to see how you assemble your new bike once you receive it.

All bikes collected from our shop, are built, tested and ready to ride. For hassle-free home delivery and bike set-up from a qualified mechanic use our Premier Delivery Service

Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. Bikes ordered for delivery will not arrive with the pedals installed, please refer to the owners manual and pedal installation guides provided for guidance. We do not install accessories to bikes, including mudguards. Bikes ordered for delivery that have tubeless compatible tyres and rims will arrive with inner tubes installed or with tubeless valves installed, this will be brand dependent. Sealant is available to be purchased separately.

If you require any assistance please contact our Customer Care team.

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