Bikes / Argon 18 / Sum
Argon 18 Sum 2026 Geometry, Reviews, and Specs
ARGON 18 Sum Pro Ultegra Di2 2026 - Vélo de route performance - Mathieu ...Fit and steering
Aggressive fitSlow steeringFast steeringRelaxed fit Argon 18 Sum 2026 Sizing Guide
Argon 18 Sum 2026 Geometry Chart
| Size | Stack | Reach | Stack/reach | Stem | Bar | Crank | Head tube angle | Seat tube angle | Chainstay | Wheelbase | BB drop | Wheel size |
|---|
| XS | 528 mm | 368 mm | 1.43:1 | 80 mm | 380 mm | 165 mm | 71.0° | 74.0° | 415 mm | 990 mm | 75 mm | 700c |
| S | 546 mm | 374 mm | 1.46:1 | 90 mm | 400 mm | 170 mm | 71.5° | 73.5° | 415 mm | 998 mm | 75 mm | 700c |
| M | 564 mm | 380 mm | 1.48:1 | 100 mm | 420 mm | 172.5 mm | 72.0° | 73.5° | 415 mm | 1006 mm | 73 mm | 700c |
| L | 582 mm | 386 mm | 1.51:1 | 110 mm | 440 mm | 175 mm | 72.5° | 73.0° | 415 mm | 1016 mm | 73 mm | 700c |
| XL | 600 mm | 392 mm |
2026 colorways
This year's studio shot is ARGON 18 Sum Pro Ultegra Di2 2026 - Vélo de route performance - Mathieu ....
- 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 Sum. 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 Sum side by side
