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.
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.
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.
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 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.
Highlights
- 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
Technical Specification
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 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.
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".