Rear tire: 700C×28.
Velopedia Bicycle Archive
2021 Specialized S-Works Roubaix - SRAM Red eTAP AXS
Original specifications: geometry for 7 published sizes.
Selling this bike? Get the spec link and selling options
At a glance
- Model year
- 2021
- Category
- Road
- Original MSRP
- $12,500.00
- Sizes
- 44, 49, 52, 54, 56, 58, 61
- Colors
- Gloss Green Tint/Spectraflair/Satin Flake Silver
- Geometry
- 7 manufacturer sizes
- In this record
- 19 specifications · 3 archived images · original MSRP · geometry
- Archive ID
- 900004295
Model history 1 other year
Checking your bike’s model year? Compare its frame details and original finish with nearby years.
- Published colors
- Gloss Green Tint/Spectraflair/Satin Flake Silver
- Frame
- Carbon Fiber
Colors can vary by market and components can be replaced. These are identification clues, not proof of the frame’s year.
Original buildCarbon Fiber
Frameset
| Frame Construction | FACT 11R, Rider First Engineered™ (RFE), FreeFoil Shape Library tubes, threaded BB, 12x142mm thru-axle, flat-mount disc |
|---|---|
| Frame Material | Carbon Fiber |
| Fork | Future Shock 2.0 w/ Smooth Boot, 12x100mm thru-axle, flat-mount disc |
Drivetrain
| Shifters | SRAM RED eTap AXS |
|---|---|
| Front Derailleur | SRAM RED eTAP AXS, braze-on |
| Rear Derailleur | SRAM RED eTAP AXS, 12-speed |
| Crankset | SRAM FC Red DUB, Power Meter, 12-speed; chainrings: 46/33T |
| Bottom Bracket | SRAM DUB BSA 68 |
| Cassette | SRAM RED XG-1290, 12-speed, 10-33T |
| Chain | SRAM CN Red 12-speed |
| Pedals | Pedal, Test Ride Pedals Provided by Specialized |
Brakes
| Brakes | (F) SRAM RED eTAP AXS, hydraulic disc / (R) SRAM RED eTAP AXS, hydraulic disc |
|---|
Cockpit & Contact Points
| Handlebar | S-Works Carbon Hover Drop 125mm, Reach 75mm, w/Di2 hole |
|---|---|
| Stem | S-Works Future Stem w/ Integrated Computer mount |
| Saddle | Body Geometry S-Works Power |
| Seatpost | S-Works Pave |
Wheels & Tires
| Wheels | (F) Roval Alpinist CLX, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, Roval AFD hub, 21h, DT Swiss Aerolite spokes / (R) Roval Alpinist CLX, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, Roval AFD hub, 24h, DT Swiss Aerolite spokes |
|---|---|
| Front Tire | Turbo Cotton, 700x28 |
| Rear Tire | Turbo Cotton, 700x28 |
Geometry
Frame measurements by size.
Frame diagram
Select an available measurement to locate it on the frame.
All geometry measurements7 sizes · 20 measurements
| Measurement | 44 | 49 | 52 | 54 | 56 | 58 | 61 |
|---|---|---|---|---|---|---|---|
| Seat tube | 365 mm | 410 mm | 446 mm | 465 mm | 485 mm | 505 mm | 547 mm |
| Effective top tube | 512 mm | 525 mm | 533 mm | 545 mm | 563 mm | 579 mm | 595 mm |
| Head tube | 90 mm | 100 mm | 112 mm | 125 mm | 143 mm | 170 mm | 205 mm |
| Head-tube angle | 70° | 71.5° | 72° | 72.75° | 73.5° | 73.5° | 74° |
| Seat-tube angle | 74° | 74° | 74° | 74° | 73.5° | 73.5° | 73.5° |
| Chainstay / rear center | 413 mm | 413 mm | 413 mm | 415 mm | 415 mm | 418 mm | 418 mm |
| Wheelbase | 981 mm | 982 mm | 986 mm | 988 mm | 995 mm | 1014 mm | 1024 mm |
| Bottom-bracket drop | 77.5 mm | 77.5 mm | 77.5 mm | 76 mm | 76 mm | 74.5 mm | 74.5 mm |
| Bottom-bracket height | 265 mm | 265 mm | 265 mm | 266 mm | 266 mm | 268 mm | 268 mm |
| Reach | 353 mm | 363 mm | 368 mm | 376 mm | 384 mm | 392 mm | 398 mm |
| Stack | 540 mm | 555 mm | 570 mm | 585 mm | 605 mm | 630 mm | 665 mm |
| Standover height | 682 mm | 715 mm | 743 mm | 762 mm | 783 mm | 805 mm | 844 mm |
| Fork offset / rake | 50 mm | 50 mm | 50 mm | 44 mm | 44 mm | 44 mm | 44 mm |
| Front center | 580 mm | 581 mm | 586 mm | 585 mm | 592 mm | 607 mm | 618 mm |
| Trail | 71 mm | 62 mm | 59 mm | 61 mm | 55 mm | 55 mm | 52 mm |
| Fork length / axle-to-crown | 370 mm | 370 mm | 370 mm | 370 mm | 370 mm | 370 mm | 370 mm |
| Seatpost length | 380 mm | 380 mm | 380 mm | 380 mm | 380 mm | 380 mm | 450 mm |
| Crank length | 165 mm | 165 mm | 170 mm | 172.5 mm | 172.5 mm | 175 mm | 175 mm |
| Stem length | 70 mm | 80 mm | 90 mm | 100 mm | 100 mm | 110 mm | 110 mm |
| Handlebar width | 360 mm | 380 mm | 400 mm | 420 mm | 420 mm | 440 mm | 440 mm |
Dimensions as recorded.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
RPM = pedal turns per minute.
How it works
Ratio = front teeth ÷ rear teeth. Hub gears also include the hub’s internal ratio. A 400% range means the highest ratio is four times the lowest.
Speeds are estimates from tire size and pedal cadence. Actual speeds vary.
Try your current gearingChanged tires or gears? Calculate your setup.
Your changes apply to this calculation. The archived build stays unchanged.
Gearing results
| Measure | Original | Your setup |
|---|---|---|
| Lowest ratio | — | — |
| Highest ratio | — | — |
| Total range | — | — |
| Lowest-gear speed | — | — |
| Highest-gear speed | — | — |
Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.
Parts & serviceability
Find replacement parts
12-speed, 10-33T

SRAM RED XG-1290 Cassette One Color, 12-Speed 10-33
12-speed

SRAM RED AXS 12-Speed Rear Derailleur Black, Max 36t
More parts (6)Fewer parts
700x28
Replacement search: 700cx28 bicycle tire Before ordering: Check rim type and tire clearance.TEST RIDE PEDALS PROVIDED BY SPECIALIZED
Power Meter, 12-speed; chainrings: 46/33T
braze-on
Based on the original build. Check fit and installed parts before ordering. Affiliate links may earn Velopedia a commission. As an Amazon Associate I earn from qualifying purchases.
Service essentials
Start with the original build, then check what is fitted to your bike today.
- Front tire
- Turbo Cotton, 700x28Check the fitted tire’s size and rim type; replacements may differ from the original.
- Rear tire
- Turbo Cotton, 700x28Read the rear tire’s size marking. Do not assume it matches the front.
- Drivetrain
- 12-speedMatch the chain or belt to the installed drivetrain family; speed count alone is not a fit guarantee.
- Seatpost diameter
- Not confirmed in this recordCheck the diameter stamped on the post. A seat-clamp diameter is a different measurement.
- Bottom bracket / shell
- SRAM DUB BSA 68Confirm shell type and width, crank interface, and spindle length or spacers before ordering.
Bike-specific inspection checklist 19 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: 2021 Specialized S-Works Roubaix - SRAM Red eTAP AXS · Road · Published sizes: 44, 49, 52, 54, 56, 58, 61
Frame and fork
Inspect the frame and fork →Archived: Frame: FACT 11R, Rider First Engineered™ (RFE), FreeFoil Shape Library tubes, threaded BB, 12x142mm thru-axle, flat-mount disc · Fork: Future Shock 2.0 w/ Smooth Boot, 12x100mm thru-axle, flat-mount disc
Drivetrain
Check drivetrain wear →Archived: Shifters: SRAM RED eTAP AXS · Front derailleur: SRAM RED eTAP AXS, braze-on · Rear derailleur: SRAM RED eTAP AXS, 12-speed · Crankset: SRAM FC Red DUB, Power Meter, 12-speed; chainrings: 46/33T · Bottom bracket: SRAM DUB BSA 68 · Cassette: SRAM RED XG-1290, 12-speed, 10-33T · Chain: SRAM CN Red 12-speed
Brakes
Inspect the brakes →Archived: Brakes: (F) SRAM RED eTAP AXS, hydraulic disc / (R) SRAM RED eTAP AXS, hydraulic disc
Wheels and tires
Check wheels and tires →Archived: Front tire: Turbo Cotton, 700x28 · Rear tire: Turbo Cotton, 700x28
Controls and contact points
Archived: Handlebar: S-Works Carbon Hover Drop 125mm, Reach 75mm, w/Di2 hole · Stem: S-Works Future Stem w/ Integrated Computer mount · Seatpost: S-Works Pave · Saddle: Body Geometry S-Works Power · Pedals: PEDAL, TEST RIDE PEDALS PROVIDED BY SPECIALIZED
Before and during the test ride
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Gallery3 images
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.





