
Velopedia Bicycle Archive
2027 Specialized Aethos 2 Expert - Shimano Ultegra Di2
Original manufacturer specifications including 7.27 kg (16 lb, 0.4 oz) published weight, geometry for 6 published sizes.
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What Velopedia knows
- Model year
- 2027
- Category
- Road
- Original MSRP
- $6,499.99
- Sizes
- 49, 52, 54, 56, 58, 61
- Colors
- Dolomite Metallic / Shadow Silver
- Weight
- 7.27 kg (16 lb, 0.4 oz)
- Geometry
- 6 manufacturer sizes · Geometry context
- Record coverage
- 20 preserved details · 7 archived images · original MSRP · preserved geometry
- Archive ID
- 900001088
Frameset
| Frame Construction | Aethos 2 FACT 10r Carbon, Rider First Engineered™, Threaded BB, Hidden Cable Routing, 12x142mm thru-axle, flat-mount disc |
|---|---|
| Frame Material | Carbon Fiber |
| Fork | Aethos 2 FACT 10r Carbon, 12x100mm thru-axle, flat-mount disc |
| Fork Material | Carbon Fiber |
Drivetrain
| Shifters | Shimano Ultegra Di2 R8170, hydraulic disc |
|---|---|
| Front Derailleur | Shimano Ultegra Di2 R8150, braze-on |
| Rear Derailleur | Shimano Ultegra Di2 R8150, 12-speed |
| Crankset | Shimano Ultegra R8100, 52/36t |
| Bottom Bracket | Shimano Threaded BSA BB |
| Cassette | Shimano Ultegra, 12-speed, 11-30t |
| Chain | Shimano XT CN-M8100, 12-speed |
Brakes
| Brakes | (F) Shimano Ultegra BR-R8170 Hydraulic Brake / (R) Shimano Ultegra BR-R8170 Hydraulic Brake |
|---|
Cockpit & Contact Points
| Handlebar | Roval Alpinist Carbon Handlebar, 125mm drop, 75mm reach |
|---|---|
| Stem | Roval Alpinist, alloy, 4 bolt, -6 degrees |
| Saddle | Body Geometry Power Expert, hollow Ti rails |
| Seatpost | Roval Alpinist Carbon Seatpost |
Wheels & Tires
| Wheels | (F) Roval C38, 21mm internal width carbon rim / (R) Roval C38, 21mm internal width carbon rim, tubeless ready |
|---|---|
| Front Tire | S-Works Turbo, 700x30 |
| Rear Tire | S-Works Turbo, 700x30 |
Size-specific frame data
Geometry
Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.
| Measurement | 49 | 52 | 54 | 56 | 58 | 61 |
|---|---|---|---|---|---|---|
| Seat tube | 450 mm | 470 mm | 490 mm | 510 mm | 535 mm | 570 mm |
| Effective top tube | 508 mm | 526 mm | 544 mm | 557 mm | 572 mm | 584 mm |
| Head tube | 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° |
| Seat-tube angle | 75.5° | 74.5° | 74° | 74° | 74° | 74° |
| Chainstay / rear center | 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 |
| Bottom-bracket drop | 76.5 mm | 76.5 mm | 75 mm | 75 mm | 73.5 mm | 73.5 mm |
| Bottom-bracket height | 265.5 mm | 265.5 mm | 267 mm | 267 mm | 268.5 mm | 268.5 mm |
| Reach | 373 mm | 377 mm | 384 mm | 391 mm | 398 mm | 404 mm |
| Stack | 522 mm | 538 mm | 559 mm | 580 mm | 606 mm | 627 mm |
| Standover height | 719 mm | 737 mm | 759 mm | 779 mm | 805 mm | 834 mm |
| Fork offset / rake | 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 |
| Trail | 62 mm | 58 mm | 55 mm | 55 mm | 55 mm | 52 mm |
| Fork length / axle-to-crown | 372 mm | 372 mm | 372 mm | 372 mm | 372 mm | 372 mm |
| Crank length | 165 mm | 165 mm | 170 mm | 170 mm | 172.5 mm | 172.5 mm |
| Stem length | 80 mm | 90 mm | 100 mm | 100 mm | 110 mm | 110 mm |
| Handlebar width | 380 mm | 400 mm | 400 mm | 420 mm | 420 mm | 440 mm |
Geometry source: Manufacturer HTML geometry table ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Geometry tools
Analyze a published size
49 geometry
Archive context: The seat angle of 75.5° sits toward the steeper end. Its bottom-bracket drop of 76.5 mm sits toward the deeper-drop end. Its reach of 373 mm sits somewhat shorter than typical.
Compared with 83 distinct road geometries in the Small-equivalent size cohort from model years 2025–2027 in the Velopedia archive.52 geometry
Archive context: Its wheelbase of 981 mm sits toward the shorter end. The seat angle of 74.5° sits toward the steeper end. Its bottom-bracket drop of 76.5 mm sits toward the deeper-drop end.
Compared with 84 distinct road geometries in the Medium-equivalent size cohort from model years 2025–2027 in the Velopedia archive.54 geometry
Archive context: Its trail of 55 mm sits toward the lower-trail end. Its bottom-bracket drop of 75 mm sits somewhat deeper than typical. The chainstay of 410 mm sits somewhat shorter than typical.
Compared with 84 distinct road geometries in the Medium-equivalent size cohort from model years 2025–2027 in the Velopedia archive.56 geometry
Archive context: Its trail of 55 mm sits toward the lower-trail end. Its bottom-bracket drop of 75 mm sits toward the deeper-drop end. The seat angle of 74° sits toward the steeper end.
Compared with 73 distinct road geometries in the Large-equivalent size cohort from model years 2025–2027 in the Velopedia archive.58 geometry
Archive context: Its trail of 55 mm sits toward the lower-trail end. The seat angle of 74° sits toward the steeper end. Its bottom-bracket drop of 73.5 mm sits somewhat deeper than typical.
Compared with 59 distinct road geometries in the XL-equivalent size cohort from model years 2025–2027 in the Velopedia archive.61 geometry
Archive context: The seat angle of 74° sits toward the steeper end. Its trail of 52 mm sits toward the lower-trail end. Its bottom-bracket drop of 73.5 mm sits somewhat deeper than typical.
Compared with 37 distinct road geometries in the XXL-equivalent size cohort from model years 2025–2027 in the Velopedia archive.Parts & serviceability
Find replacement parts
More qualified parts (6)
Searches use the archived manufacturer specification, not the components currently installed on a particular bicycle. Confirm the exact model, size and fit before ordering. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases. Commercial relationships do not influence Archive specifications or analysis.
Used-bike inspection
If you’re buying this bike used
Before any test ride: both brakes should stop the bike firmly and release cleanly; both wheels should run true and be securely attached; tires should have no casing damage; and the headset, handlebar, stem, cranks and pedals should have no looseness or play.
Follow the full used-bike inspection order →- FrameInspect the frame in bright light, especially around the head tube, bottom bracket, chainstays and clamped areas. Look for cracks, ripples, crushed sections or signs of a previous impact.Inspect the frame and fork →
- BrakesTest each brake separately and confirm it stops firmly and releases cleanly. Inspect the pads and braking surfaces for wear or contamination, and check the cables or hoses for damage.Inspect the brakes →
- DrivetrainConfirm every shift-system battery charges, every shift control works and the derailleur moves cleanly across the cassette. Make sure the matching shift-system charger is included, then measure chain wear and inspect the cassette teeth.Check drivetrain wear →
- Wheels & tiresSpin both wheels and watch the rims for side-to-side or vertical movement. Check for dents, cracks, loose or uneven spokes and hub play, then inspect both tire casings for cuts, cracking or exposed threads. If it is set up tubeless, confirm both tires hold pressure and ask when the sealant was last refreshed.Check wheels and tires →
- Bottom bracketTurn the cranks slowly, feel for rough bearings and check for side-to-side play. Creaking under load deserves investigation but does not identify the source by itself.Inspect the bottom bracket and shell →
Bike-specific inspection checklist 20 checks based on 5 archived component groups Open checklistClose checklist
This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.
Identity and fit
Follow the full used-bike inspection order →Archived: 2027 Specialized Aethos 2 Expert - Shimano Ultegra Di2 · Road · Published sizes: 49, 52, 54, 56, 58, 61
Frame and fork
Inspect the frame and fork →Archived: Frame: Aethos 2 FACT 10r Carbon, Rider First Engineered™, Threaded BB, Hidden Cable Routing, 12x142mm thru-axle, flat-mount disc · Fork: Aethos 2 FACT 10r Carbon, 12x100mm thru-axle, flat-mount disc · Carbon Fiber
Drivetrain
Check drivetrain wear →Archived: Shifters: Shimano Ultegra Di2 R8170, hydraulic disc · Front derailleur: Shimano Ultegra Di2 R8150, braze-on · Rear derailleur: Shimano Ultegra Di2 R8150, 12-speed · Crankset: Shimano Ultegra R8100, 52/36t · Bottom bracket: Shimano Threaded BSA BB · Cassette: Shimano Ultegra, 12-speed, 11-30t · Chain: Shimano XT CN-M8100, 12-speed
Brakes
Inspect the brakes →Archived: Brakes: (F) Shimano Ultegra BR-R8170 Hydraulic Brake / (R) Shimano Ultegra BR-R8170 Hydraulic Brake
Wheels and tires
Check wheels and tires →Archived: Wheels: (F) Roval C38, 21mm internal width carbon rim / (R) Roval C38, 21mm internal width carbon rim, tubeless ready · Front tire: S-Works Turbo, 700x30 · Rear tire: S-Works Turbo, 700x30
Controls and contact points
Archived: Handlebar: Roval Alpinist Carbon Handlebar, 125mm drop, 75mm reach · Stem: Roval Alpinist, alloy, 4 bolt, -6 degrees · Seatpost: Roval Alpinist Carbon Seatpost · Saddle: Body Geometry Power Expert, hollow Ti rails
Before and during the test ride
Follow the full used-bike inspection order →Build relationships are limited to the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.
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Gallery
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.




