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

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.

Highlights

• 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