2021 Sonder Frontier SX Eagle Rigid
- Category
- Rigid MTB
- Design
- Flat Bar, Rigid, suspension corrected
- Frame
- Aluminum
- Fork
- Aluminum
- Features
- Disc brake
Geometry
Small | Medium | Large | X-Large | |
Stack | 566mm | 580mm | 594mm | 613mm |
Reach | 390mm | 420mm | 440mm | 460mm |
Stack to Reach Ratio | 1.45:1 | 1.38:1 | 1.35:1 | 1.33:1 |
Seat Tube Length, C-T | 380mm | 430mm | 480mm | 520mm |
Top Tube Length, Effective/Horizontal HT Top | 566mm | 602mm | 622mm | 647mm |
Top Tube Slope | 22deg | 17.2deg | 13.1deg | 10.7deg |
Head Tube Angle | 68deg | 68deg | 68deg | 68deg |
Seat Tube Angle | 73deg | 73deg | 73deg | 73deg |
Head Tube Length | 110mm | 130mm | 130mm | 150mm |
Bottom Bracket Drop | 50mm | 50mm | 50mm | 50mm |
Bottom Bracket Height | 313.1mm | 313.1mm | 313.1mm | 313.1mm |
Chainstay Length | 445mm | 445mm | 445mm | 445mm |
Chainstay Length Horizontal | 442.2mm | 442.2mm | 442.2mm | 442.2mm |
Front-Center | 648.8mm | 686.6mm | 706.6mm | 734mm |
Front-Center Horizontal | 646.8mm | 684.8mm | 704.8mm | 732.3mm |
Wheelbase | 1089mm | 1127mm | 1147mm | 1174.5mm |
Fork Offset/Rake | 51mm | 51mm | 51mm | 51mm |
Trail | 91.7mm very high | 91.7mm very high | 91.7mm very high | 91.7mm very high |
Mechanical Trail | 85mm | 85mm | 85mm | 85mm |
Wheel Flop | 31.9mm | 31.9mm | 31.9mm | 31.9mm |
Standover Height | 764mm | 793mm | 825mm | 853mm |
Tire to Pedal Spindle | 115.6mm 170 mm cranks | 153.5mm 170 mm cranks | 173.5mm 170 mm cranks | 200.9mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 143.1mm 170 mm cranks | 143.1mm 170 mm cranks | 143.1mm 170 mm cranks | 143.1mm 170 mm cranks |
SX Eagle Rigid Build
Small | Medium | Large | X-Large | |
Wheel Size | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD |
Tire Width | 2.8in | 2.8in | 2.8in | 2.8in |
Tire Outer Diameter | 726.2mm | 726.2mm | 726.2mm | 726.2mm |
Bike Length with Tires | 1815.2mm | 1853.2mm | 1873.2mm | 1900.7mm |
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
Rigid MTBSource:https://alpkit.com/collections/sonder-frontier/products/sonder-frontier-sx-eagle-rigid