2026 Argon 18 Anti Matter Base XL
Build
700C/29 in × 45 mm
Insights
Somewhat aggressive stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Argon 18 Anti Matter
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 607mm |
| Reach | 409mm |
| Stack to Reach Ratio | 1.48:1 |
| Seat Tube Length, C-T | 595mm |
| Top Tube Length, Effective/Horizontal HT Top | 601mm |
| Top Tube Slope | 3.9deg |
| Head Tube Angle | 72.2deg |
| Seat Tube Angle | 72.5deg |
| Head Tube Length | 176mm |
| Bottom Bracket Drop | 76mm |
| Bottom Bracket Height | 280mm |
| Chainstay Length | 425mm |
| Chainstay Length Horizontal | 418.2mm |
| Front-Center | 638.4mm |
| Front-Center Horizontal | 633.9mm |
| Wheelbase | 1052mm |
| Fork Offset/Rake | 51mm |
| Fork Length (Axle-To-Crown) | 400mm |
| Trail | 60.7mm mid/neutral |
| Mechanical Trail | 57.8mm |
| Wheel Flop | 17.7mm |
| Standover Height | 866mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 112.4mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 110mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 45mm |
| Tire Outer Diameter | 712mm |
| Bike Length with Tires | 1764mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Carbon/Composite |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Source:https://www.argon18.com/en/bikes/gravel/anti-matter/anti-matter-rival