2021 Sonder Vir Fortis Base Small
Build
26 in × 4 in
Insights
Somewhat aggressive stack and reach vs trend of rigid fatbike bikes
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 586mm |
| Reach | 406mm |
| Stack to Reach Ratio | 1.44:1 |
| Seat Tube Length, Unknown | 406mm |
| Top Tube Length, Effective/Horizontal Unknown | 580mm |
| Top Tube Slope | 20.7deg |
| Head Tube Angle | 68.5deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 100mm |
| Bottom Bracket Drop | 60mm |
| Bottom Bracket Height | 321.1mm |
| Chainstay Length | 445mm |
| Chainstay Length Horizontal | 440.9mm |
| Front-Center | 664.8mm |
| Front-Center Horizontal | 662.1mm |
| Wheelbase | 1103mm |
| Fork Offset/Rake | 45mm |
| Trail | 101.8mm very high |
| Mechanical Trail | 94.7mm |
| Wheel Flop | 34.7mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 113.7mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 151.1mm |
Base Build
| Wheel Size | 26 inch (559mm BSD) |
| Tire Width | 4in |
| Tire Outer Diameter | 762.2mm |
| Bike Length with Tires | 1865.2mm |
| Suspension Type | Rigid, suspension corrected |
| Bar Type | Flat Bar |
| Frame Material | Carbon/Composite |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 5 ft 2 in to 5 ft 7 in |
Source:https://alpkit.com/collections/sonder-vir-fortis/products/sonder-vir-fortis-gx-eagle