Velopedia Bicycle Archive
2026 Specialized Aethos 2 Expert
Road bicycle from the Velopedia specification archive.
- Original MSRP
- $6,999.99
- Sizes
- 49, 52, 54, 56, 58, 61
- Colors
- Gloss Dolomite Metallic / Blue Pearl Over Shadow Silver, Satin Quartz Metallic / Nebula Metallic
- Weight
- 7.05 kg (15 lb, 8.7 oz), tubeless
- Geometry
- 6 manufacturer sizes · Ride analysis
- Archive ID
- 900001039
Current market
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Velopedia analysis
What the specifications mean
Electronic shifting removes the usual shift cable but adds a separate battery and controls, while the 330% cassette range describes how much gearing is available. Hydraulic disc brakes shift routine service toward pad and rotor condition, fluid leaks and use of the correct bleed fluid. The rims and tires are tubeless-ready, but that label does not confirm the bike is currently set up without tubes; tape, valves, sealant and tire condition still matter.
Drivetrain
Electronic · 330% range
Shift-system battery state joins derailleur setup and sprocket compatibility as a troubleshooting variable.
Brake service
Hydraulic disc
Pad and rotor condition plus the correct bleed fluid are the primary service checks.
Tire setup
Tubeless-ready
The rims and tires may support tubeless use, but the bike may still be running tubes.
Frame material
Carbon / composite
Look for impact damage and clamp marks rather than metal-style dents or rust.
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 →
- BrakesBoth levers should feel firm and return cleanly. Check for fluid around the levers and calipers, inspect pad thickness and contamination, and look for worn or bent rotors.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: 2026 Specialized Aethos 2 Expert · 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: SRAM Force AXS E1 · Front derailleur: SRAM Force AXS E1, braze-on · Rear derailleur: SRAM Force AXS E1, 12-speed · Crankset: SRAM Force E1 Crankset, 48/35t · Bottom bracket: SRAM DUB BSA 68 · Cassette: SRAM Force XG-1270, 12-speed, 10-33t · Chain: SRAM Force Flattop E1
Brakes
Inspect the brakes →Archived: Brakes: (F) SRAM Force E1, hydraulic disc / (R) SRAM Force E1, hydraulic disc
Wheels and tires
Check wheels and tires →Archived: Wheels: (F) Roval C38, 21mm internal width carbon rim, tubeless ready / (R) Roval C38, 21mm internal width carbon rim, tubeless ready · Front tire: S-Works Turbo, 700x28 · Rear tire: S-Works Turbo, 700x28
Controls and contact points
Archived: Handlebar: Roval Alpinist Carbon Handlebar, 125mm drop, 75mm reach · Stem: Specialized Pro SL, alloy, 4-bolt · Seatpost: Roval Alpinist Carbon Seatpost · Saddle: Body Geometry Power Expert
Before and during the test ride
Follow the full used-bike inspection order →Interpretation based on the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.
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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 | SRAM Force AXS E1 |
|---|---|
| Front Derailleur | SRAM Force AXS E1, braze-on |
| Rear Derailleur | SRAM Force AXS E1, 12-speed |
| Crankset | SRAM Force E1 Crankset, 48/35t |
| Bottom Bracket | SRAM DUB BSA 68 |
| Cassette | SRAM Force XG-1270, 12-speed, 10-33t |
| Chain | SRAM Force Flattop E1 |
Brakes
| Brakes | (F) SRAM Force E1, hydraulic disc / (R) SRAM Force E1, hydraulic disc |
|---|
Cockpit & Contact Points
| Handlebar | Roval Alpinist Carbon Handlebar, 125mm drop, 75mm reach |
|---|---|
| Stem | Specialized Pro SL, alloy, 4-bolt |
| Saddle | Body Geometry Power Expert |
| Seatpost | Roval Alpinist Carbon Seatpost |
Wheels & Tires
| Wheels | (F) Roval C38, 21mm internal width carbon rim, tubeless ready / (R) Roval C38, 21mm internal width carbon rim, tubeless ready |
|---|---|
| Front Tire | S-Works Turbo, 700x28 |
| Rear Tire | S-Works Turbo, 700x28 |
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 | 170 mm | 172.5 mm | 172.5 mm | 175 mm | 175 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 interpretation
What this geometry means
49 geometry
Riding position
The 522 mm stack is low relative to the 373 mm reach, giving the frame a performance-oriented, lower-front-end proportion with more potential for a stretched riding position. A 75.5° seat angle puts the rider relatively forward over the bottom bracket, shortening the effective seated reach compared with a more relaxed seat angle.
Handling tendencies
A 71.4° head angle combined with a 978 mm wheelbase points to more stability-oriented steering and chassis behavior. The longer the chassis and slacker the front end, the more the bike tends to favor composure over very quick direction changes. A 76.5 mm bottom-bracket drop places the rider relatively low between the wheels, which can add a settled cornering feel while reducing pedal clearance compared with a higher bottom bracket.
Archive context
The seat angle of 75.5° sits toward the steeper end. Its bottom-bracket drop of 76.5 mm sits somewhat deeper than typical. Its trail of 62 mm sits somewhat higher than typical.
52 geometry
Riding position
The 538 mm stack is low relative to the 377 mm reach, giving the frame a performance-oriented, lower-front-end proportion with more potential for a stretched riding position. A 74.5° seat angle puts the rider relatively forward over the bottom bracket, shortening the effective seated reach compared with a more relaxed seat angle.
Handling tendencies
A 72.1° head angle combined with a 981 mm wheelbase points to moderate and balanced steering and chassis behavior. The longer the chassis and slacker the front end, the more the bike tends to favor composure over very quick direction changes. A 76.5 mm bottom-bracket drop places the rider relatively low between the wheels, which can add a settled cornering feel while reducing pedal clearance compared with a higher bottom bracket.
Archive context
Its stack of 538 mm sits toward the lower end. The seat angle of 74.5° sits toward the steeper end. Its reach of 377 mm sits toward the shorter end.
54 geometry
Riding position
The 384 mm reach and 559 mm stack form a moderate road-bike proportion, balancing cockpit length with front-end height rather than pushing to an extreme race-low or endurance-upright shape.
Handling tendencies
A 72.5° head angle combined with a 992 mm wheelbase points to moderate and balanced steering and chassis behavior. The longer the chassis and slacker the front end, the more the bike tends to favor composure over very quick direction changes. A 75 mm bottom-bracket drop places the rider relatively low between the wheels, which can add a settled cornering feel while reducing pedal clearance compared with a higher bottom bracket.
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 seat angle of 74° sits somewhat steeper than typical.
56 geometry
Riding position
The 391 mm reach and 580 mm stack form a moderate road-bike proportion, balancing cockpit length with front-end height rather than pushing to an extreme race-low or endurance-upright shape.
Handling tendencies
A 73° head angle combined with a 998 mm wheelbase points to moderate and balanced steering and chassis behavior. The longer the chassis and slacker the front end, the more the bike tends to favor composure over very quick direction changes. A 75 mm bottom-bracket drop places the rider relatively low between the wheels, which can add a settled cornering feel while reducing pedal clearance compared with a higher bottom bracket.
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 75 mm sits toward the deeper-drop end.
58 geometry
Riding position
The 398 mm reach and 606 mm stack form a moderate road-bike proportion, balancing cockpit length with front-end height rather than pushing to an extreme race-low or endurance-upright shape.
Handling tendencies
A 73° head angle combined with a 1013 mm wheelbase points to moderate and balanced steering and chassis behavior. The longer the chassis and slacker the front end, the more the bike tends to favor composure over very quick direction changes. A 73.5 mm bottom-bracket drop places the rider relatively low between the wheels, which can add a settled cornering feel while reducing pedal clearance compared with a higher bottom bracket.
Archive context
The seat angle of 74° sits toward the steeper end. Its trail of 55 mm sits toward the lower-trail end. Its bottom-bracket drop of 73.5 mm sits toward the deeper-drop end.
61 geometry
Riding position
With 627 mm of stack against 404 mm of reach, the frame is comparatively tall for its length, giving more scope for an upright road position without relying as heavily on spacers or a high-rise stem.
Handling tendencies
A 73.5° head angle combined with a 1020 mm wheelbase points to moderate and balanced steering and chassis behavior. The longer the chassis and slacker the front end, the more the bike tends to favor composure over very quick direction changes. A 73.5 mm bottom-bracket drop places the rider relatively low between the wheels, which can add a settled cornering feel while reducing pedal clearance compared with a higher bottom bracket.
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 toward the deeper-drop end.
Across the size range
From 49 to 61, reach grows by 31 mm and stack by 105 mm, showing how the frame becomes both longer and taller through the published size range. The rear center stays essentially constant at about 410 mm across sizes, so most of the wheelbase growth happens in the front half of the bike rather than by lengthening the rear triangle.
Geometry describes frame proportions and likely tendencies, not a ride test. Rider proportions, cockpit setup, tires, suspension settings, wheel configuration, and component choices can materially change how a bicycle fits and feels.
Gallery
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.