Bikes / Argon 18 / Dark Matter
Argon 18 Dark Matter 2026 Geometry, Reviews, and Specs
Dark Matter | Adventure Starts Now | Argon 18 Gravel Bike | Argon 18Fit and steering
Aggressive fitSlow steeringFast steeringRelaxed fit Argon 18 Dark Matter 2026 Sizing Guide
Argon 18 Dark Matter 2026 Geometry Chart
| Size | Stack | Reach | Stack/reach | Stem | Bar | Crank | Head tube angle | Seat tube angle | Chainstay | Wheelbase | BB drop | Wheel size |
|---|
| XS | 540 mm | 372 mm | 1.45:1 | 80 mm | 380 mm | 165 mm | 70.5° | 74.0° | 430 mm | 1020 mm | 76 mm | 700c |
| S | 558 mm | 380 mm | 1.47:1 | 90 mm | 400 mm | 170 mm | 71.0° | 73.5° | 430 mm | 1030 mm | 76 mm | 700c |
| M | 576 mm | 388 mm | 1.48:1 | 100 mm | 420 mm | 172.5 mm | 71.5° | 73.5° | 430 mm | 1040 mm | 74 mm | 700c |
| L | 594 mm | 396 mm | 1.50:1 | 110 mm | 440 mm | 175 mm | 72.0° | 73.0° | 430 mm | 1052 mm | 74 mm | 700c |
| XL | 612 mm |
2026 colorways
This year's studio shot is Dark Matter | Adventure Starts Now | Argon 18 Gravel Bike | Argon 18.
- We do not have a full OEM palette to diff against 2025 yet.
What changed in the bike frame
Same published geometry as 2025.
- Published geometry matches the 2025 Argon 18 Dark Matter. Same sizes, same stack and reach.
What changed in equipment
No verified spec sheet for 2026 or 2025.
What changed in price
No launch MSRP in the catalog yet.
Compare 2026 and 2025 Argon 18 Dark Matter side by side
