Lowest1.06:1
Highest4.80:1
Total range453%
7.6–34.3 mph at 90 rpm, estimated from the published rear tire size 700×28c · 28-622 ETRTO.
Velopedia Bicycle Archive
2026 Specialized S-Works Aethos 2 - SRAM RED AXS
Original specifications: 5.98 kg (13 lb, 2.9 oz), tubeless published weight · geometry for 6 published sizes.
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At a glance
- Model year
- 2026
- Category
- Road
- Original MSRP
- $13,999.99
- Sizes
- 49, 52, 54, 56, 58, 61
- Colors
- Satin Carbon, Red Tint
- Weight
- 5.98 kg (13 lb, 2.9 oz), tubeless
- Geometry
- 6 manufacturer sizes
- In this record
- 18 specifications · 8 archived images · original MSRP · geometry
- Archive ID
- 900001083
Original buildCarbon Fiber
Frameset
| Frame Construction | 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 |
|---|---|
| Frame Material | Carbon Fiber |
| Fork | S-Works Aethos 2 FACT 12r Carbon, 12x100mm thru-axle, flat-mount disc |
| Fork Material | Carbon Fiber |
Drivetrain
| Shifters | SRAM RED AXS E1, hydraulic disc |
|---|---|
| Front Derailleur | SRAM RED AXS E1, braze-on |
| Rear Derailleur | SRAM RED AXS E1 |
| Crankset | SRAM RED AXS Power Meter, 48/35 |
| Bottom Bracket | SRAM DUB BSA 68 |
| Cassette | SRAM RED XG-1290 E1, 12-speed, 10-33t |
| Chain | SRAM RED E1 Flattop 12-speed |
Brakes
| Brakes | (F) SRAM RED E1, hydraulic disc / (R) SRAM RED E1, hydraulic disc |
|---|
Cockpit & Contact Points
| Handlebar | Roval Alpinist Cockpit II, Integrated Bar/Stem |
|---|---|
| Saddle | S-Works Power with Mirror |
| Seatpost | Roval Alpinist Carbon Seatpost, light weight clamp |
Wheels & Tires
| Wheels | (F) Roval Alpinist CLX III, Tubeless, 33mm depth, 26.5 width, and 21mm internal width carbon rim, Roval LF21-F 21H hub with Sinc Ceramic Bearings, Roval by ARRIS Composite Aero Spoke with Ti end fittings / (R) Roval Alpinist CLX III, Tubeless, 33mm depth, 26.5 width, and 21mm internal width carbon rim, Roval LF19-R 24H hub with Sinc Ceramic Bearings, Roval by ARRIS Composite Aero Spoke with Ti end fittings |
|---|---|
| Front Tire | S-Works Turbo TLR Race Tire, 700x28c |
| Rear Tire | S-Works Turbo TLR Race Tire, 700x28c |
Geometry
Frame measurements by size.
Published frame view
Size
Measurement
Measurement
—
Select an available measurement to locate it on the frame.
All geometry measurements6 sizes · 19 measurements
| 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 | 380 mm | 400 mm | 400 mm | 420 mm | 420 mm |
Measurements may vary by configuration, wheel size, or frame setting where noted in the published chart.
Gearing
Lower ratios provide more mechanical advantage for climbing. Higher ratios turn the rear wheel farther with each crank revolution.
Parts & serviceability
Find replacement parts
SRAM RED E1 Flattop 12-speed
Search: SRAM RED E1 Flattop 12-speed chain
Retailer offers · Affiliate links
Silca Pre-Waxed Chain 12/13-Speed, Sram Red
Sram Red
SRAM RED XG-1290 E1, 12-speed, 10-33t
Search: SRAM XG-1290 12-speed 10-33 cassette
Retailer offers · Affiliate links
SRAM RED XG-1290 Cassette One Color, 12-Speed 10-33
12-Speed 10-33
SRAM DUB BSA 68
More parts (5)
SRAM RED AXS Power Meter, 48/35
Retailer offers · Affiliate links
SRAM RED AXS Power Meter Spider DUB Crankset Black, 160mm, 48/35t
160mm, 48/35t
SRAM RED AXS E1, braze-on
Search: SRAM RED 12-speed electronic front derailleur
SRAM RED AXS E1
Search: SRAM RED 12-speed electronic rear derailleur
Retailer offers · Affiliate links
SRAM RED AXS 12-Speed Rear Derailleur Black, Max 36t
Max 36t
SRAM RED AXS E1, hydraulic disc
Search: SRAM RED 12-speed electronic shifter
Roval Alpinist Carbon Seatpost, light weight clamp
Based on the original build. Confirm the model, size and fit before ordering; installed parts may differ. 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.
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 S-Works Aethos 2 - SRAM RED AXS · Road · Published sizes: 49, 52, 54, 56, 58, 61
Frame and fork
Inspect the frame and fork →Archived: 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 · Fork: S-Works Aethos 2 FACT 12r Carbon, 12x100mm thru-axle, flat-mount disc · Carbon Fiber
Drivetrain
Check drivetrain wear →Archived: Shifters: SRAM RED AXS E1, hydraulic disc · Front derailleur: SRAM RED AXS E1, braze-on · Rear derailleur: SRAM RED AXS E1 · Crankset: SRAM RED AXS Power Meter, 48/35 · Bottom bracket: SRAM DUB BSA 68 · Cassette: SRAM RED XG-1290 E1, 12-speed, 10-33t · Chain: SRAM RED E1 Flattop 12-speed
Brakes
Inspect the brakes →Archived: Brakes: (F) SRAM RED E1, hydraulic disc / (R) SRAM RED E1, hydraulic disc
Wheels and tires
Check wheels and tires →Archived: Front tire: S-Works Turbo TLR Race Tire, 700x28c · Rear tire: S-Works Turbo TLR Race Tire, 700x28c
Controls and contact points
Archived: Handlebar: Roval Alpinist Cockpit II, Integrated Bar/Stem · Seatpost: Roval Alpinist Carbon Seatpost, light weight clamp · Saddle: S-Works Power with Mirror
Before and during the test ride
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Gallery8 images
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.