Geometry ?
Argon 18 Grey Matter 2026 geometry in sizes XXS–XL: stack 525–630 mm, reach 358–408 mm, head angle 69.5–72.5°.
| XXS | XS | S | M | L | XL | |
|---|---|---|---|---|---|---|
| Stack | 525 mm | 545 mm | 565 mm | 585 mm | 605 mm | 630 mm |
| Reach | 358 mm | 368 mm | 378 mm | 388 mm | 398 mm | 408 mm |
| Head angle | 69.5° | 71° | 71.4° | 72° | 72° | 72.5° |
| Seat angle | 75.5° | 74.9° | 74.3° | 73.7° | 73.1° | 72.5° |
| Seat tube (c-t) | 420 mm | 450 mm | 485 mm | 520 mm | 555 mm | 590 mm |
| Head tube | 104 mm | 119 mm | 144 mm | 160 mm | 187 mm | 211 mm |
| Top tube (effective) | 496 mm | 517 mm | 538 mm | 560 mm | 582 mm | 607 mm |
| BB drop | 80 mm | 80 mm | 75 mm | 75 mm | 70 mm | 70 mm |
| Chainstay | 428 mm | 428 mm | 428 mm | 428 mm | 430 mm | 432 mm |
| Wheelbase | 1003 mm | 1006 mm | 1021 mm | 1027 mm | 1048 mm | 1062 mm |
| Standover | 689 mm | 716 mm | 753 mm | 783 mm | 818 mm | 849 mm |
| Stock build by size | ||||||
| Cranks | 165 mm | 170 mm | 170 mm | 172.5 mm | 172.5 mm | 175 mm |
| Stem | 70 mm | 80 mm | 90 mm | 100 mm | 110 mm | 110 mm |
| Bar width | 400 mm | 400 mm | 420 mm | 440 mm | 440 mm | 440 mm |
| Seatpost setback | 20 mm | 20 mm | 20 mm | 20 mm | 20 mm | 20 mm |
Source: argon18.com, checked 1 Nov 2026 · bar position: worked out from published data
An older model year in the archive with the same stack, reach and head angle: 2025. Source: storage.googleapis.com
Corrected values: head angle
XL head angle 75.5 → 72.5°. Argon 18 gives a 75.5° head angle for XL. From the wheelbase and the other dimensions it works out at about 72.5°. Corrections
Stock build
Grey Matter SRAM Apex AXS XPLR €2,695
- Groupset
- SRAM Apex AXS XPLR 1×12
- Shifters
- SRAM Apex AXS
- Cranks
- SRAM Apex AXS 1 DUB 42
- Stem
- FSA OS-167 Omega Pro
- Handlebar
- FSA NS Adventure Compact HR-RD-310S
- Seatpost
- FSA Gossamer SB20 Seat Post (27.2 mm)
- Saddle
- Prologo Akero
- List price
- €2,695 (argon18.com, 1 Nov 2026)
Grey Matter SRAM Apex XPLR (mechanical) €2,295
- Groupset
- SRAM Apex XPLR mechanical 1×12
- Shifters
- SRAM Apex XPLR mech.
- Cranks
- SRAM Apex AXS 1 DUB 42
- Stem
- FSA OS-167 Omega Pro
- Handlebar
- FSA NS Adventure Compact HR-RD-310S
- Seatpost
- FSA Gossamer SB20 Seat Post (27.2 mm)
- Saddle
- Prologo Akero
- List price
- €2,295 (argon18.com, 1 Nov 2026)
Source for all builds: argon18.com, checked 1 Nov 2026
Frames with similar geometry
Stack and reach within 12 mm of size XXS (stack 525 / reach 358 mm).
Stack and reach within 12 mm of size XS (stack 545 / reach 368 mm).
Stack and reach within 12 mm of size S (stack 565 / reach 378 mm).
Stack and reach within 12 mm of size M (stack 585 / reach 388 mm).
Stack and reach within 12 mm of size L (stack 605 / reach 398 mm).
Stack and reach within 12 mm of size XL (stack 630 / reach 408 mm).
Spotted a mistake or a missing build? Let me know.