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
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Manufacturer catalog

Published sizes and colors

6 sizes · 1 color

Manufacturer-published sizes and colors; availability and exact size/color pairings may vary by market or production run.

Published sizes

495254565861

Published colors

Dolomite Metallic / Shadow Silver

Frameset

Frame ConstructionAethos 2 FACT 10r Carbon, Rider First Engineered™, Threaded BB, Hidden Cable Routing, 12x142mm thru-axle, flat-mount disc
Frame MaterialCarbon Fiber
ForkAethos 2 FACT 10r Carbon, 12x100mm thru-axle, flat-mount disc
Fork MaterialCarbon Fiber

Drivetrain

ShiftersShimano Ultegra Di2 R8170, hydraulic disc
Front DerailleurShimano Ultegra Di2 R8150, braze-on
Rear DerailleurShimano Ultegra Di2 R8150, 12-speed
CranksetShimano Ultegra R8100, 52/36t
Bottom BracketShimano Threaded BSA BB
CassetteShimano Ultegra, 12-speed, 11-30t
ChainShimano XT CN-M8100, 12-speed

Brakes

Brakes(F) Shimano Ultegra BR-R8170 Hydraulic Brake / (R) Shimano Ultegra BR-R8170 Hydraulic Brake

Cockpit & Contact Points

HandlebarRoval Alpinist Carbon Handlebar, 125mm drop, 75mm reach
StemRoval Alpinist, alloy, 4 bolt, -6 degrees
SaddleBody Geometry Power Expert, hollow Ti rails
SeatpostRoval 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 TireS-Works Turbo, 700x30
Rear TireS-Works Turbo, 700x30

Size-specific frame data

Geometry

6 sizes · 19 measurements

Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.

Measurement495254565861
Seat tube450 mm470 mm490 mm510 mm535 mm570 mm
Effective top tube508 mm526 mm544 mm557 mm572 mm584 mm
Head tube114 mm128 mm150 mm169 mm198 mm218 mm
Head-tube angle71.4°72.1°72.5°73°73°73.5°
Seat-tube angle75.5°74.5°74°74°74°74°
Chainstay / rear center410 mm410 mm410 mm410 mm410 mm410 mm
Wheelbase978 mm981 mm992 mm998 mm1013 mm1020 mm
Bottom-bracket drop76.5 mm76.5 mm75 mm75 mm73.5 mm73.5 mm
Bottom-bracket height265.5 mm265.5 mm267 mm267 mm268.5 mm268.5 mm
Reach373 mm377 mm384 mm391 mm398 mm404 mm
Stack522 mm538 mm559 mm580 mm606 mm627 mm
Standover height719 mm737 mm759 mm779 mm805 mm834 mm
Fork offset / rake50 mm50 mm50 mm47 mm47 mm47 mm
Front center581 mm584 mm594 mm599 mm614 mm621 mm
Trail62 mm58 mm55 mm55 mm55 mm52 mm
Fork length / axle-to-crown372 mm372 mm372 mm372 mm372 mm372 mm
Crank length165 mm165 mm170 mm170 mm172.5 mm172.5 mm
Stem length80 mm90 mm100 mm100 mm110 mm110 mm
Handlebar width380 mm400 mm400 mm420 mm420 mm440 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

Choose a 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.
Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze 49 geometry

Parts & serviceability

Find replacement parts

3 top part searches
ChainExact archived part
Shimano XT CN-M8100, 12-speed Interpreted as Shimano Deore XT · 12-speed Exact archived model
CassetteMatching configuration
Shimano Ultegra, 12-speed, 11-30t Interpreted as Shimano Ultegra · 12-speed Component family — verify exact version
Brake padsExact archived part
(F) Shimano Ultegra BR-R8170 Hydraulic Brake / (R) Shimano Ultegra BR-R8170 Hydraulic Brake Brake model identified — verify pad shape
More qualified parts (6)
Bottom bracketExact archived part
Shimano Threaded BSA BB Named archived component — verify dimensions
CranksetExact archived part
Shimano Ultegra R8100, 52/36t Component family — verify exact version
Front derailleurMatching configuration
Shimano Ultegra Di2 R8150, braze-on Interpreted as Shimano Ultegra · 12-speed · Di2 Component family — verify exact version
Rear derailleurMatching configuration
Shimano Ultegra Di2 R8150, 12-speed Interpreted as Shimano Ultegra · 12-speed · Di2 Component family — verify exact version
ShiftersQualified part search
Shimano Ultegra Di2 R8170, hydraulic disc Interpreted as Shimano Ultegra · 12-speed · Di2 Component family — verify exact version
HandlebarQualified part search
Roval Alpinist Carbon Handlebar, 125mm drop, 75mm reach Named archived component — verify dimensions

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.

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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
0 of 20 checked Progress stays in this browser for this bike.

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.

Archived: 2027 Specialized Aethos 2 Expert - Shimano Ultegra Di2 · Road · Published sizes: 49, 52, 54, 56, 58, 61

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

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

Archived: Brakes: (F) Shimano Ultegra BR-R8170 Hydraulic Brake / (R) Shimano Ultegra BR-R8170 Hydraulic Brake

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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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.

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