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