2 day delivery

Specialized Aethos Sport Road Bike

£3,250.00

Check to see if we have it in stock - just select your colour and size.

Specialized
Aethos Sport Road Bike

We're sorry, but unfortunately, we're unable to ship this item to your country

Selected sizes/colours of this bike are available for priority dispatch and delivered within 2 working days.

Product ID: 1749262

Why buy your bike from Sigma Sports?

sigma sports expert advice
Expert Advice

Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. We’ll be happy to answer any questions you may have. Contact us now or visit us in-store.

sigma sports cycle schemes
Cycle to Work Schemes

Save up to 47% with any one of our 11 Cycle to Work partners, and get the health benefits of a new bike in exchange for tax free salary sacrifice. To find out more about our various partners and how to apply click here.

Bike Delivery Options

Choose between Free Bike Delivery - to your home or place of work - or our new Premier Bike Delivery Service £99.99 and have your bike delivered "ready to ride" and set up to your measurements with seatpost and pedals adjusted on arrival by a qualified bike mechanic. Either way, our Customer Care team will be in touch to arrange a delivery date to suit you.

laka insurance
Laka Insurance

We've partnered with Laka to offer you 30 days free bike Insurance on your new bike purchase over £400. Click here for more info and find out how to claim.

Specialized Aethos Comp Road Bike

Harnessing 46 years of rider-centric expertise, we present the Aethos—a bike crafted for the sheer love of riding. Balancing superior ride quality, extreme lightweight, and undeniable style, the Aethos Sport model exemplifies this commitment.

The Aethos frame epitomizes the pinnacle of ride experience, combining ultimate feel, lightness, and style. Through a groundbreaking redesign of traditional road shapes, we've achieved remarkable gains in stiffness and balance without compromising weight or durability. With an entirely new layup and perfected processes over decades, the Aethos stands as the lightest frame available (585 grams, S-Works, size 56cm), marking the inception of a new era in biking. A featherweight frame alone is insufficient without confidence-inspiring ride characteristics, driving our meticulous development of the Aethos. Achieving a perfect balance of front and rear stiffness, coupled with exceptional ride quality, we've delved into the nuances of carbon fiber flex and breathing, setting a new standard in sublime rides. Every detail, from derailleur hangers to the fork expander plug, embodies our commitment to style, weight, and durability. Additionally, we've equipped it with Roval’s all-new Alpinist carbon seatpost, further enhancing weight savings and ride attributes. Each element contributes to our relentless pursuit of the perfect ride.

Technical Specification

Frame Aethos FACT 9R Carbon, Rider First EngineeredTM, Threaded BB, 12x142mm thru-axle, flat-mount disc
Fork FACT Carbon, 12x100mm thru-axle, flat-mount disc
Handlebars Specialized Shallow Drop, 6061, 70x125mm, 31.8mm clamp
Stem Specialized Pro SL, alloy, 4-bolt
Tape Supacaz Super Sticky Kush
Seatpost Roval Alpinist Carbon Seatpost
Seat Binder Specialized Alloy, 30mm
Front Brake Shimano 105, Hydraulic disc
Rear Brake Shimano 105, Hydraulic disc
Shift Levers Shimano 105, 12 speed Mechanical
Front Derailleur Shimano 105, Braze-on
Rear Derailleur Shimano 105, 12 speed Mechanical
Cassette Shimano 105, 12-speed, 11-34t
Chain Shimano SLX, M7100, 12-speed
Crankset FC-R7100, 105, 12-Speed, Holllowtech 2
Chainrings 50/34T
Bottom Bracket Shimano Threaded BSA BB
Front Wheel DT R470 Disc
Rear Wheel DT R470 Disc
Front Tire Turbo Pro, 700x28
Saddle Body Geometry Power Sport, steel rails
Rear Tire Turbo Pro, 700x28
Inner Tubes Presta Valve Standard, 48mm valves
Weight 7.80kg (17 lb, 3.1 oz)
Weight Size 56

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.


Specialized Aethos Sport Road Bike Sizing



Unable to display Reviews due to Privacy Settings.

Adjust your Cookie Preferences to Opt-in "YES" to "Functional Cookies".

Unable to display Q&A due to Privacy Settings.

Adjust your Cookie Preferences to Opt-in "YES" to "Functional Cookies".

Close menu