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 Ultegra Di2 Road Bike 2024
The Aethos line epitomizes excellence in three core aspects: exceptional light weight, perfectly-balanced ride characteristics, and undeniable style. True to its lineage, the Aethos Pro upholds these promises seamlessly. Outfitted with Shimano's Ultegra Di2 for impeccable shifting and Roval’s Alpinist wheels paired with DT Swiss 350 hubs, it presents a fuss-free build that consistently delivers mile after mile. The Aethos frame embodies the pinnacle of ride experience, blending ultimate feel, lightweight construction, and stylish design. Through innovative design alterations and advanced layup processes, it achieves unparalleled stiffness and balance without compromise in weight or durability, boasting a featherlight frame of just 585 grams (S-Works, size 56cm). More than just a bike, the Aethos heralds a new era in cycling innovation. Its exceptional ride quality stems from a meticulous balance of front and rear stiffness, achieved through groundbreaking insights into carbon fiber behavior. Every component, from derailleur hangers to the fork expander plug, is meticulously crafted for style, weight reduction, and durability. With Roval’s Alpinist carbon seatpost and wheels enhancing its performance, the Aethos stands as a testament to the relentless 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 |
| Cassette | Shimano Ultegra, 12-speed, 11-30t |
| Bottom Bracket | Shimano Threaded BSA BB |
| Rear Derailleur | Shimano Ultegra Di2 R8150, 12-speed |
| Crankset | Shimano Ultegra R8100 with 4iiiis Power Meter |
| Front Derailleur | Shimano Ultegra Di2 R8150, braze-on |
| Shift Levers | Shimano Ultegra Di2 R8170, hydraulic disc |
| Chain | Shimano M8100, 12-speed w/ quick link |
| Front Wheel | Roval Alpinist CL II, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes, Tubeless Ready |
| Rear Wheel | Roval Alpinist CL II, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes, Tubeless Ready |
| Inner Tubes | 700x20-28, 48mm Presta Valve |
| Front Tire | S-works Turbo 2BR, 700x28mm |
| Rear Tire | S-works Turbo 2BR, 700x28mm |
| Weight Size | 56 |
| Weight | 6.78kg (14 lb, 15.2 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 Road Bike 2024 Sizing
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