2016 Sonder Vir Fortis Base

Design
Flat Bar, Rigid, suspension corrected
Frame
Carbon/Composite
Fork
Carbon/Composite
Features
Disc brake
Somewhat aggressive stack and reachvs category
Somewhat aggressive stack and reachvs category
Average stack and reachvs category

Geometry

Small
Medium
Large
Stack
586mm
595mm
614mm
Reach
406mm
423mm
437mm
Stack to Reach Ratio
1.44:1
1.41:1
1.41:1
Seat Tube Length, Unknown
406mm
457mm
505mm
Top Tube Length, Effective/Horizontal Unknown
580mm
605mm
625mm
Top Tube Slope
20.7deg
15.8deg
12.6deg
Head Tube Angle
68.5deg
68.5deg
68.5deg
Seat Tube Angle
73.5deg
73deg
73deg
Head Tube Length
100mm
110mm
130mm
Bottom Bracket Drop
60mm
60mm
60mm
Bottom Bracket Height
327.5mm
327.5mm
327.5mm
Chainstay Length
445mm
445mm
445mm
Chainstay Length Horizontal
440.9mm
440.9mm
440.9mm
Front-Center
664.8mm
684.7mm
706.6mm
Front-Center Horizontal
662.1mm
682.1mm
704.1mm
Wheelbase
1103mm
1123mm
1145mm
Fork Offset/Rake
45mm
45mm
45mm
Trail
104.3mm
very high
104.3mm
very high
104.3mm
very high
Mechanical Trail
97mm
97mm
97mm
Wheel Flop
35.6mm
35.6mm
35.6mm
Tire to Pedal Spindle
107.3mm
170 mm cranks
127.3mm
170 mm cranks
149.2mm
170 mm cranks
Pedal Spindle to Ground Clearance
157.5mm
170 mm cranks
157.5mm
170 mm cranks
157.5mm
170 mm cranks

Base Build

Small
Medium
Large
Wheel Size
26 in
559 mm BSD
26 in
559 mm BSD
26 in
559 mm BSD
Tire Width
4.25in
4.25in
4.25in
Tire Width Max
4.8in
4.8in
4.8in
Tire Outer Diameter
774.9mm
774.9mm
774.9mm
Bike Length with Tires
1877.9mm
1897.9mm
1919.9mm

Published Sizing Recommendations

Height
5 ft 2 in
to
5 ft 7 in
5 ft 6 in
to
5 ft 10 in
5 ft 9 in
to
6 ft 2 in

Stack and Reach vs. Category Trend

Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Learn more about the Upright/Aggressive Scale
Category Trend
Rigid Fatbike
Source:https://www.alpkit.com/sonder/sonder-vir-fortis