2 day delivery

Specialized Aethos Pro Ultegra Di2 Disc Road Bike


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

Aethos Pro Ultegra Di2 Disc 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: 1717787

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 Pro Ultegra Di2 Disc Road Bike

The Aethos series pledges an extraordinary trifecta—remarkable lightness, impeccably balanced ride qualities, and unmistakable style—and the Aethos Pro lives up to this commitment. Representing the culmination of countless calculations in the quest for the ultimate ride, the Aethos boasts a Shimano Ultegra Di2 drivetrain for seamless, precise shifts and is equipped with Roval’s Alpinist wheels paired with DT Swiss 350 hubs, ensuring a reliable and straightforward build that delivers mile after mile. Crafted to perfection, the Aethos frame achieves an optimal blend of exceptional ride feel, minimal weight, and eye-catching style. Through innovative adjustments to traditional road shapes, we've enhanced stiffness and balance without compromising weight or durability. Weighing in at a mere 585 grams (S-Works, size 56cm), the Aethos isn't just a new bike; it marks the dawn of a new era. Beyond its featherweight frame, the Aethos excels in providing confidence-inspiring ride characteristics, balancing front and rear stiffness with an unparalleled ride quality. Meticulously designed details, from derailleur hangers to the fork expander plug, prioritize style, weight, and durability. Featuring Roval’s new Alpinist carbon seatpost and wheels, the Aethos goes above and beyond in the pursuit of the perfect ride.

Technical Specification

Frame Aethos FACT 10r Carbon, Rider First Engineered™, Threaded BB, 12x142mm thru-axle, flat-mount disc
Fork FACT Carbon, 12x100mm thru-axle, flat-mount disc
Saddle Body Geometry Power Pro, hollow titanium rails
SeatPost Roval Alpinist Carbon Seatpost
Handlebars S-Works Short & Shallow, 125mm Drop, 75mm Reach w/Di2 Hole
Seat Binder Specialized Alloy, 30mm
Stem Specialized Pro SL, alloy, 4-bolt
Tape Supacaz Super Sticky Kush
Front Brake Shimano Ultegra R8170, hydraulic disc
Rear Brake Shimano Ultegra R8170, hydraulic disc
Chainrings 52/36T
Bottom Bracket Shimano Threaded BSA BB
Crankset Shimano Ultegra R81000
Rear Derailleur Shimano Ultegra R8150, 12-speed
Front Derailleur Shimano Ultegra R8150, braze-on
Shift Levers Shimano Ultegra R8170, hydraulic disc
Cassette Shimano Ultegra, 12-speed, 11-30t
Chain Shimano M8100, 12-speed w/ quick link
Inner Tubes 700x20-28, 48mm Presta Valve
Front Wheel Roval Alpinist CL, Tubeless, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes
Rear Wheel Roval Alpinist CL, Tubeless, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes
Front Tire S-works Turbo 2BR, 700x28mm
Rear Tire S-works Turbo 2BR, 700x28mm
Weight Size 56
Weight 6.93kg (15 lb, 4.4 oz)

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 Pro Ultegra Di2 Disc 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