2026 Specialized S-Works Aethos 2 - Shimano Dura-Ace Di2 Features
At just 595 grams, the S-Works Aethos 2 is the lightest production road frame in the world. But that was never the point. Built by breaking the rules of racing to deliver pure road riding bliss, Aethos 2 is engineered to disappear beneath you. Impossibly responsive, supple, and sublime.
Now with increased tire clearance, refined components, and data-based fit-enhancing geometry, it brings that transcendent ride feel to more riders than ever. Aethos 2 breaks the rules, for the love of the ride.
At a Glance
- Use - Performance Road Riding
- Frameset - 595g FACT 12r Frame / FACT 12r Fork
- Fit - Performance Endurance
- Cockpit & Wheels - Roval Alpinist II and CLX III wheels
- Drivetrain - Shimano Dura-Ace Di2
- Weight - 6.05kg (56cm)
Component Specifications
| Frame | S-Works Aethos 2 FACT 12r Carbon, Rider First Engineered™, Ceramic Speed SLT Headset Bearings, Threaded BB, Hidden Cable Routing, 12x142mm thru-axle, flat-mount disc |
| Seat Binder | Specialized Alloy, 30.0mm, titanium bolt |
| Fork | S-Works Aethos 2 FACT 12r Carbon, 12x100mm thru-axle, flat-mount disc |
| Shift Levers | Shimano Dura-Ace Di2 R9270, hydraulic disc |
| Front Derailleur | Shimano Dura-Ace Di2 R9250, braze-on |
| Rear Derailleur | Shimano Dura-Ace Di2 R9250, 12-speed |
| Cassette | Shimano Dura-Ace, 12-speed, 11-30t |
| Chain | Shimano XTR M9100, 12-speed w/ quick link |
| Crankset | Shimano Dura-Ace R9200, HollowTech II, 12-speed with 4iiii Precision Pro dual-sided powermeter, 52/36t |
| Bottom Bracket | Shimano Dura-Ace, BB-R9100 |
| Front Tire | S-Works Turbo TLR Race Tire, 700x28c |
| Rear Tire | S-Works Turbo TLR Race Tire, 700x28c |
| Inner Tubes | 700x25-35, 50mm Presta Valve, TPU |
| Front Brake | Shimano Dura-Ace BR-R9270 hydraulic brake |
| Rear Brake | Shimano Dura-Ace BR-R9270 hydraulic brake |
| Handlebars | Roval Alpinist Cockpit II, Integrated Bar/Stem |
| Saddle | S-Works Power with Mirror |
| Seatpost | Roval Alpinist Carbon Seatpost, light weight clamp |
2026 Specialized S-Works Aethos 2 - Shimano Dura-Ace Di2
| Bike/Frame Size | 49 | 52 | 54 | 56 | 58 | 61 |
|---|---|---|---|---|---|---|
| Stack | 522 mm | 538 mm | 559 mm | 580 mm | 606 mm | 627 mm |
| Reach | 373 mm | 377 mm | 384 mm | 391 mm | 398 mm | 404 mm |
| Chainstay Length | 410 mm | 410 mm | 410 mm | 410 mm | 410 mm | 410 mm |
| Wheelbase | 978 mm | 981 mm | 992 mm | 998 mm | 1013 mm | 1020 mm |
| Top Tube Length, Horizontal | 508 mm | 526 mm | 544 mm | 557 mm | 572 mm | 584 mm |
| Bike Standover Height | 719 mm | 737 mm | 759 mm | 779 mm | 805 mm | 834 mm |
| Seat Tube Length | 450 mm | 470 mm | 490 mm | 510 mm | 535 mm | 570 mm |
| Seat Tube Angle | 75.5° | 74.5° | 74° | 74° | 74° | 74° |
| Head Tube Length | 114 mm | 128 mm | 150 mm | 169 mm | 198 mm | 218 mm |
| Head Tube Angle | 71.4° | 72.1° | 72.5° | 73° | 73° | 73.5° |
| BB Height | 265.5 mm | 265.5 mm | 267 mm | 267 mm | 268.5 mm | 268.5 mm |
| BB Drop | 76.5 mm | 76.5 mm | 75 mm | 75 mm | 73.5 mm | 73.5 mm |
| Trail | 62 mm | 58 mm | 55 mm | 55 mm | 55 mm | 52 mm |
| Fork Length, Full | 372 mm | 372 mm | 372 mm | 372 mm | 372 mm | 372 mm |
| Fork Rake/Offset | 50 mm | 50 mm | 50 mm | 47 mm | 47 mm | 47 mm |
| Front Center | 581 mm | 584 mm | 594 mm | 599 mm | 614 mm | 621 mm |
Size Guide: 2026 Specialized S-Works Aethos 2 - Shimano Dura-Ace Di2
