Good to know: Integrated cockpit
Integrated cockpit (a one-piece bar and stem) on at least one build. Changing the length means replacing the whole cockpit, and not every length exists. Check which length the bike actually ships with before you buy.
Geometry ?
Argon 18 Anti Matter 2026 geometry in sizes XS–XL: stack 508–607 mm, reach 377–409 mm, head angle 70.7–72.2°.
| XS | S | M | L | XL | |
|---|---|---|---|---|---|
| Stack | 508 mm | 531 mm | 555 mm | 580 mm | 607 mm |
| Reach | 377 mm | 384 mm | 392 mm | 400 mm | 409 mm |
| Head angle | 70.7° | 71.1° | 71.7° | 71.1° | 72.2° |
| Seat angle | 74.5° | 74° | 73.5° | 73° | 72.5° |
| Seat tube (?) | 425 mm | 460 mm | 505 mm | 550 mm | 595 mm |
| Head tube | 76 mm | 101 mm | 122 mm | 150 mm | 176 mm |
| Top tube (effective) | 520 mm | 538 mm | 558 mm | 578 mm | 601 mm |
| BB drop | 80 mm | 78 mm | 78 mm | 76 mm | 76 mm |
| Chainstay | 425 mm | 425 mm | 425 mm | 425 mm | 425 mm |
| Wheelbase | 1004 mm | 1016 mm | 1022 mm | 1039 mm | 1052 mm |
| Standover | 714 mm | 749 mm | 788 mm | 828 mm | 866 mm |
| Fork length | 400 mm | 400 mm | 400 mm | 400 mm | 400 mm |
| Fork offset | 51 mm | 51 mm | 51 mm | 51 mm | 51 mm |
| Stock build by size | |||||
| Cranks | 165 mm | 170 mm | 170 mm | 172.5 mm | 172.5 mm |
| Stem | 90 mm | 90 mm | 100 mm | 110 mm | 120 mm |
| Bar width | 360 mm | 360 mm | 380 mm | 380 mm | 380 mm |
| Seatpost setback | 20 mm | 20 mm | 20 mm | 20 mm | 20 mm |
(?) by the seat tube length: the manufacturer doesn’t say whether it’s measured centre to centre (c-c) or centre to top (c-t).
Source: argon18.com, checked 1 Nov 2026 · bar position: worked out from published data
Stock build
Anti Matter SRAM RED XPLR AXS E1 €11,995
- Groupset
- SRAM Red XPLR AXS E1 1×13
- Shifters
- SRAM Red AXS E1
- Cranks
- SRAM Red 1 PM E1 XPLR 44T Aero
- Stem
- ATTEN CHB-01 Aero Handlebar
- Handlebar
- ATTEN CHB-01 Aero Handlebar
- Seatpost
- Argon 18 Anti Matter Aero, 20 mm SB
- Saddle
- Repente Quasar CR Carbon Rail
- List price
- €11,995 (argon18.com, 1 Nov 2026)
Anti Matter SRAM Force XPLR AXS E1 €8,495
- Groupset
- SRAM Force XPLR AXS E1 1×13
- Shifters
- SRAM Force AXS E1
- Cranks
- SRAM Force 1 PM E1 XPLR 44T Aero
- Stem
- ATTEN CHB-01 Aero Handlebar
- Handlebar
- ATTEN CHB-01 Aero Handlebar
- Seatpost
- Argon 18 Anti Matter Aero, 20 mm SB
- Saddle
- Repente Quasar 2.0
- List price
- €8,495 (argon18.com, 1 Nov 2026)
Anti Matter SRAM Rival AXS E1 €5,995
- Groupset
- SRAM Rival XPLR AXS E1 1×13
- Shifters
- SRAM Rival AXS E1
- Cranks
- SRAM Rival 1 E1 XPLR 40T
- Stem
- ATTEN CHB-01 Aero Handlebar
- Handlebar
- ATTEN CHB-01 Aero Handlebar
- Seatpost
- Argon 18 Anti Matter Aero, 20 mm SB
- Saddle
- Repente Quasar S 2.0
- List price
- €5,995 (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 XS (stack 508 / reach 377 mm).
Stack and reach within 12 mm of size S (stack 531 / reach 384 mm).
Stack and reach within 12 mm of size M (stack 555 / reach 392 mm).
Stack and reach within 12 mm of size L (stack 580 / reach 400 mm).
Stack and reach within 12 mm of size XL (stack 607 / reach 409 mm).
Spotted a mistake or a missing build? Let me know.