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Good condition approved used bike with some cosmetic damage to the chainstaysm rear derailleur and shifters
Bike builds don't get much lighter than this and the Specialized S-Works Aethos Disc Road Bike pairs a FACT 12r carbon frameset with SRAM's flagship electronic RED eTap AXS 12-Speed groupset and Roval's lightest Alpinist CLX wheels.
A bike engineered to create the perfect ride, the Aethos breaks the UCI weight lower limit and is aimed at riders that may race, but wish for something that delivers performance and rides beautifully when off the circuit. The frame alone weighs an incredibly low 588 grams in a size 56, with the full build sitting at 6kg. The updated tubes and carbon layup are responsible for this, minimising material while enhancing stiffness, stability and integrity.
The geometry and fit are borrowed from the Tarmac SL7, so this is a bike still designed to feel aggressive, racy and responsive, so you're losing nothing in performance and ride feel in the quest for low weight. Rider-First Engineered™ design that's used across the Specialized range ensures all frames offer the same positive characteristics.
12-speed SRAM RED eTap components perfect the shifting experience and bring powerful hydraulic, all-condition braking that's confidence-inspiring at speed and on wet roads. There's even a crank-based power meter included, bringing a new dimension to your training. The aforementioned Alpinist wheels have a carbon rim, AeroFlange hubs and weigh only 1248 grams, delivering strength, stiffness and smooth-rolling. Finally, a Roval Alpinist carbon seatpost offers plenty of adjustabilities to dial in your fit.
Read more about the bikes in our Specialized S-Works Aethos article.
| — | S | M | L | XL |
|---|---|---|---|---|
| A | 380 | 410 | 455 | 480 |
| B | 570 | 595 | 627 | 660 |
| C | - | - | - | - |
| D | 75.3° | 75° | 74.6° | 74.2° |
| E | - | - | - | - |
| F | 65.5° | 65.5° | 65.5° | 65.5° |
| G | 105 | 110 | 140 | 155 |
| H | 432 | 432 | 432 | 432 |
| I | 1157 | 1179 | 1212 | 1243 |

If you fall between sizes, we recommend experienced riders selecting a smaller frame which will offer faster handling. A larger bicycle offers more stability.
Should you have any specific questions, please contact us for information and talk to one of our experienced members of staff.
A: Seat Tube (CTR-TOP)
B: Horizontal Top Tube
C: Actual Top Tube
D: Actual Seat Angle
E: Effective Seat Angle
F: Head Angle
G: Head Tube
H: Chainstay
I: Wheelbase
* All measurements in mm unless otherwise stated
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Free UK delivery on orders over £50. Orders are dispatched within 1-2 working days and typically arrive 1-2 working days later.
Return unused items in their original packaging within 30 days of delivery. Return postage is £3.50.
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Founded in California in 1974, Specialized began with a simple promise: serious riders deserve serious gear. Half a century later, the brand still funds its own wind tunnel, builds its own carbon, and tests every bike with the world's best so that you ride your own best.
The first production mountain bike. The first cycling-specific shoes. FACT carbon, the Win Tunnel, S-Works. Specialized has a habit of building the things the rest of cycling ends up copying.