Why buy your bike from Sigma Sports?
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.
All our bikes are fully built by our Cytech qualified mechanics. To find out more, see the Built, Checked, Tuned and Tested section below to see how we'll deliver your bike.
We offer FREE DELIVERY of your bike to your home or place of work. Once you've placed your order, our Customer Care team will be in contact to offer a convenient delivery date of your choice.
Cyclescheme can save you up to 39% on a bike and accessories. Visit our Cycle to Work Scheme page to learn more and claim.
Specialized Aethos Pro Disc Ultegra Di2 Road Bike 2021
With the Specialized's Aethos Pro Disc Road Bike you get a combination of low weight, a balanced ride feel and sleek aesthetics, together with a Shimano Ultegra Di2 electronic groupset and Roval Alpinist CL wheels. The Aethos takes road bikes in a new direction, breaking the UCI rules and delivering a perfect ride. Engineered for the best possible ride feel and the lowest possible weight, the FACT 10r carbon layup has altered tube shapes for balanced stiffness, durability and sleek aesthetics.
Ultegra Di2 is Shimano's second-tier electronic groupset, bringing much the same performance as Dura-Ace with only a minimal weight penalty. Shifting is smooth and precise while the hydraulic braking is equally powerful on wet and dry roads. Rolling on gram-shaving Roval Alpinist CL wheels and Specialized S-Works Turbo tyres, strength and durability are balanced perfectly with sublime handling and a smooth feel. The finishing kit is equally as impressive, made up of the super-light Roval Alpinist carbon seatpost, Pro SL stem and S-Works Short & Shallow handlebar.
- Aethos FACT 10r Carbon frame and fork
- Rider-First Engineered™ design
- Electronic Shimano Ultegra Di2 R8050 disc 11-speed components
- Roval Alpinist carbon seatpost
- Roval Alpinist CL wheels and Specialized Turbo 26mm tyres
- 32mm tyre clearance
|Frame||Specialized Aethos FACT 10r Carbon, Rider-First Engineered™, Threaded BB, 12x142mm thru-axle, flat-mount disc|
|Fork||Specialized FACT Carbon, 12x100mm thru-axle, flat-mount disc|
|Bottom Bracket||Shimano BB-R9100|
|Stem||Specialized Pro SL, alloy, 4-bolt|
|Handlebar||Specialized S-Works Short & Shallow|
|Bar Tape||Supacaz Super Sticky Kush|
|Front Brake||Shimano Ultegra R8070, hydraulic disc|
|Rear Brake||Shimano Ultegra R8070, hydraulic disc|
|Brake Levers||Shimano Ultegra R8070|
|Front Derailleur||Shimano Ultegra Di2 R8050, braze-on|
|Rear Derailleur||Shimano Ultegra Di2 R8050, GS medium cage|
|Shift Levers||Shimano Ultegra R8070, 11-speed|
|Chain||Shimano Ultegra, 11-speed|
|Cassette||Shimano Ultegra R8000, 11-30t, 11-speed|
|Crankset||Shimano Ultegra R8000, HollowTech 2, 52/36t, 11-speed|
|Front Wheel||Roval Alpinist CL, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes|
|Rear Wheel||Roval Alpinist CL, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes|
|Front Tyre||Specialized S-Works Turbo, 120 TPI, folding bead, BlackBelt protection, 700x26mm, clincher|
|Rear Tyre||Specialized S-Works Turbo, 120 TPI, folding bead, BlackBelt protection, 700x26mm, clincher|
|Saddle||Specialized Body Geometry Power Pro, hollow titanium rails, carbon fibre base|
|Seatpost||Roval Alpinist carbon seatpost|
|Pedals||Available to be purchased separately|
|Manufacturer's claimed weight||6.58kg size 54cm|
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 specified), 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.
Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. We do not install accessories to bikes, including mudguards.
Specialized Aethos Pro Disc Ultegra Di2 Road Bike 2021 Sizing
Forgotten Your Password?
Please enter your registered email address below and we'll send you an email explaining the next step.
Select a store
Select the store you visit most frequently below and their stock information will show on product pages.