Specialized Roubaix
Endurance road · 6 sizes
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- Bike
- Specialized Roubaix · Endurance road · 6 sizes
- Versions
- 2020 · 2018, this table
- Geometry
- specialized.com, fetched 20 Oct 2026, re-checked, no differences
- Cockpit
- Generic stem and bar, assumed
- Solved with
- cover 15 mm (assumed), max spacers 40 mm (assumed), stem clamp centre 20 mm (assumed), so every verdict carries ±10 mm at the bar
- Sheet
- 22 October 2026 · 686 bikes, 74 makes, 3,984 sizes in the catalogue
Geometry, every size, from the maker's table
The tinted row is the size drawn beside it. Press a size to draw it.| Size | Stack (mm) | Reach (mm) | Head angle (deg) | Seat angle (deg) | Head tube (mm) | Chainstay (mm) | Wheelbase (mm) | Standover (mm) |
|---|---|---|---|---|---|---|---|---|
| 49 | 549 | 369 | 72 | 74 | 90 | 413 | 981 | 715.5 |
| 52 | 569 | 371 | 72.25 | 74 | 110 | 413 | 987 | 743 |
| 54 | 585 | 375 | 72.75 | 74 | 125 | 415 | 987 | 762 |
| 56 | 611 | 381 | 73.5 | 73.5 | 150 | 415 | 993 | 785 |
| 58 | 644 | 386 | 73.5 | 73.5 | 185 | 418 | 1011 | 813 |
| 61 | 665 | 392 | 74 | 73.5 | 205 | 418 | 1018 | 844.3 |
The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.
The 56 drawn to scale from the table, with no build on it. Stack and reach run from the bottom bracket to the top of the head tube; every size is solved from those two. One square is 100 mm.
The maker's cockpit
No stock cockpit I can name, so every size is solved on a generic stem and bar unless you choose one on the sheet.Generic stem and barAssumedNo bar is listed for this frame.
Stock stem and bar per size49 80 x 400, 52 90 x 420, 54 100 x 420, 56 100 x 420, 58 110 x 440, 61 110 x 440 (stem length x bar width, mm)
Frame facts
read from the maker's words, not a table: specialized.com- Tyre clearance
- not recorded yet
- Bottom bracket
- not recorded yet
- Axles and brakes
- 12x142 rear
- UDH
- not recorded yet
- Seatpost
- 27.2 mm round
- Frame weight
- not recorded yet
In the maker's words
Kept whole, as I read it off specialized.com.Roubaix Expert (MY2018), Specialized spec held in the page JSON: Handlebars "Specialized Expert Hover, alloy, 75x125mm" (bar reach 75 mm, drop 125 mm; a Hover riser bar, rise not printed); Stem "Specialized Pro SL, alloy, 4-bolt" (no angle printed); Seatpost "Specialized CG-R, FACT carbon, single-bolt, 27.2mm".
Cockpit and seatpost, in the maker's words · 58 words
Roubaix Expert (MY2018), Specialized spec held in the page JSON: Handlebars "Specialized Expert Hover, alloy, 75x125mm" (bar reach 75 mm, drop 125 mm; a Hover riser bar, rise not printed); Stem "Specialized Pro SL, alloy, 4-bolt" (no angle printed); Seatpost "Specialized CG-R, FACT carbon, single-bolt, 27.2mm". Stock stem length and bar width per size from the geometry table.
OFFICIAL SOURCE: Specialized US page for the Roubaix Expert (code 133928), page JSON modelYear 2018. Source: html table (official Specialized US product page for the Roubaix Expert, code 133928, the "Geometry" HTML table in the page; the GB URL for the same code answered 404; fetched 2026-10-20
How I read the maker's table
https://www.specialized.com/gb/en/roubaix-expert/p/133928 answered 404. Frame "Specialized FACT 10r carbon, Endurance Geometry, Rider-First Engineered, 12x142mm thru-axle, Future Shock suspension, 20mm of travel, flat disc mounts". Six sizes 49, 52, 54, 56, 58, 61. Top tube and standover are printed with decimals on some sizes (534.9, 561.8, 576.3, 588.5; 715.5, 844.3). The seat tube row is labelled "Seat Tube Length, BB Center to Top" (stored as seat_tube_length). Specialized's row labels: Stack, Reach, Head Tube Length, Head Tube Angle, BB Drop, Trail (printed, kept), Fork Rake/Offset (fork_offset), Front Center (front_centre), Chainstay Length, Wheelbase, Top Tube Length, Horizontal (top_tube_effective), Bike Standover Height, Seat Tube Length, BB Center to Top, Seat Tube Angle, and per size Crank Length, Handlebar Width, Stem Length, Saddle Width and Seatpost Length (stem length and bar width stored as the stock parts). Values printed with mm and degree suffixes, stripped by script. Stock tyre Turbo Pro 700x28mm.
Source: html table (official Specialized US product page for the Roubaix Expert, code 133928, the "Geometry" HTML table in the page; the GB URL for the same code answered 404; fetched 2026-10-20, HTTP 200)