2020 Sonder Cortex Base
- Category
- Full-suspension Trail MTB
- Design
- Flat Bar, Full suspension
- Frame
- Aluminum
- Suspension
- 120mm fork travel
- Features
- Disc brake
Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry |
Geometry
Small | Medium | Large | X-Large | |
Stack | 602mm | 606mm | 615mm | 625mm |
Reach | 420mm | 440mm | 465mm | 485mm |
Stack to Reach Ratio | 1.43:1 | 1.38:1 | 1.32:1 | 1.29:1 |
Seat Tube Length, C-T | 400mm | 425mm | 465mm | 485mm |
Top Tube Length, Effective/Horizontal HT Top | 587mm | 608mm | 636mm | 658mm |
Head Tube Angle | 66deg | 66deg | 66deg | 66deg |
Effective Seat Tube Angle, ETT HT Top | 74.5deg | 74.5deg | 74.5deg | 74.5deg |
Head Tube Length | 100mm | 105mm | 115mm | 125mm |
Bottom Bracket Drop | 40mm | 40mm | 40mm | 40mm |
Bottom Bracket Height | 337.5mm | 337.5mm | 337.5mm | 337.5mm |
Chainstay Length | 442mm | 445mm | 447mm | 450mm |
Chainstay Length Horizontal | 440.2mm | 443.2mm | 445.2mm | 448.2mm |
Front-Center | 729.9mm | 748.9mm | 775.8mm | 796.8mm |
Front-Center Horizontal | 728.8mm | 747.8mm | 774.8mm | 795.8mm |
Wheelbase | 1169mm | 1191mm | 1220mm | 1244mm |
Fork Offset/Rake | 51mm | 51mm | 51mm | 51mm |
Fork Length (Axle-To-Crown) | 540mm | 540mm | 540mm | 540mm |
Trail | 112.3mm very high | 112.3mm very high | 112.3mm very high | 112.3mm very high |
Mechanical Trail | 102.5mm | 102.5mm | 102.5mm | 102.5mm |
Wheel Flop | 41.7mm | 41.7mm | 41.7mm | 41.7mm |
Tire to Pedal Spindle | 182.4mm 170 mm cranks | 201.4mm 170 mm cranks | 228.3mm 170 mm cranks | 249.3mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 167.5mm 170 mm cranks | 167.5mm 170 mm cranks | 167.5mm 170 mm cranks | 167.5mm 170 mm cranks |
Base Build
Small | Medium | Large | X-Large | |
Wheel Size | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 2.5in | 2.5in | 2.5in | 2.5in |
Tire Outer Diameter | 755mm | 755mm | 755mm | 755mm |
Bike Length with Tires | 1924mm | 1946mm | 1975mm | 1999mm |
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 | 6 ft 2 in to |
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 ScaleCategory Trend
Full-suspension Trail MTBSource:https://alpkit.com/collections/sonder-cortex/products/sonder-cortex-gx-eagle