Argon 18 Equation
Endurance road · 6 sizes
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- Bike
- Argon 18 Equation · Endurance road · 6 sizes
- Geometry
- argon18.com, fetched 29 Aug 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
- 6 September 2026 · 210 bikes, 43 makes, 1,262 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) |
|---|---|---|---|---|---|---|---|---|
| XXS | 518 | 359 | 70.3 | 75.5 | 84 | 417 | 981 | 673 |
| XS | 537 | 369 | 71.3 | 74.9 | 101 | 417 | 989 | 700 |
| S | 558 | 379 | 72 | 74.3 | 120 | 420 | 997 | 734 |
| M | 578 | 388 | 72 | 73.7 | 141 | 420 | 1013 | 764 |
| L | 600 | 397 | 72 | 73.1 | 166 | 420 | 1030 | 797 |
| XL | 623 | 407 | 72.5 | 72.5 | 189 | 420 | 1043 | 827 |
The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.
The M 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.
In the maker's words
Kept whole, as I read it off argon18.com.Equation (frameset / Shimano 105 build) with a two-piece bar and stem per build; fork length 387 mm, rake 52 mm (XXS-XS) / 47 mm (S-XL), trail printed.
Cockpit and seatpost, in the maker's words · 48 words
Equation (frameset / Shimano 105 build) with a two-piece bar and stem per build; fork length 387 mm, rake 52 mm (XXS-XS) / 47 mm (S-XL), trail printed. 3D head tube extension 0 / 25 mm: with the 25 mm extension stack is 541/561/581/602/623/646 and reach 351/361/372/381/390/400 mm.
OFFICIAL SOURCE: Argon 18 Equation build page, six sizes XXS-XL. Source: html table (official Argon 18 build page, "Geometry and fit" section, an HTML grid (div cells) in centimetres; converted to mm by script; fetched 2026-08-29
How I read the maker's table
the grid uses decimal commas throughout (converted). Reach row labelled "K Reach S" on this page. UNITS: Argon 18 prints lengths in centimetres to one decimal (some pages with a decimal comma) and angles in degrees; every length was multiplied by 10 to give millimetres. ARGON 3D SYSTEM: the frames take head tube extensions (0 / 15 / 25 / 35 mm depending on model); the page prints H2/H3 head tube lengths and the "Stack 3D (25mm)" / "Reach 3D (25mm)" rows for the extended settings - this file stores the 0 mm (bare) values and the extended stack/reach are in notes. Front centre not published (null). Argon prints fork rake and fork length under a "cm" unit label but sometimes as millimetres (e.g. "51.0" rake, "400.0" fork length): values of 20 or more were taken as millimetres, smaller ones as centimetres. Size labels XXS-XL with Argon's cm equivalents 44-46 / 47-50 / 51-53 / 54-56 / 57-59 / 60-62. Model year not printed (null).
Source: html table (official Argon 18 build page, "Geometry and fit" section, an HTML grid (div cells) in centimetres; converted to mm by script; fetched 2026-08-29, HTTP 200)