2025 Sonder Frontier Rigid Medium
Build
650B/27.5 in × 2.4 in
Stack and Reach vs. Category Trend
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Geometry
| Stack | 580mm |
| Reach | 420mm |
| Stack to Reach Ratio | 1.38:1 |
| Seat Tube Length, C-T | 430mm |
| Top Tube Length, Effective/Horizontal HT Top | 602mm |
| Top Tube Slope | 17.2deg |
| Head Tube Angle | 68deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 130mm |
| Bottom Bracket Drop | 50mm |
| Bottom Bracket Height | 303mm |
| Chainstay Length | 445mm |
| Chainstay Length Horizontal | 442.2mm |
| Front-Center | 686.6mm |
| Front-Center Horizontal | 684.8mm |
| Wheelbase | 1127mm |
| Fork Offset/Rake | 51mm |
| Trail | 87.6mm very high |
| Mechanical Trail | 81.2mm |
| Wheel Flop | 30.4mm |
| Standover Height | 793mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 163.7mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 133mm |
Rigid Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.4in |
| Tire Outer Diameter | 705.9mm |
| Bike Length with Tires | 1832.9mm |
| Suspension Type | Rigid, suspension corrected |
| Bar Type | Flat Bar |
| Frame Material | Aluminum |
| Fork Material | Aluminum |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 5 ft 6 in to 5 ft 10 in |
Source:https://alpkit.com/products/sonder-frontier-deore-rigid?variant=39448559157353