2025 Sonder Broken Road ST (Frame Only) Small
Build
700C/29 in × 2.4 in
Insights
Somewhat aggressive stack and reach vs trend of hardtail cross-country mtb bikes
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 585mm |
| Reach | 410mm |
| Stack to Reach Ratio | 1.43:1 |
| Seat Tube Length, Unknown | 410mm |
| Top Tube Length, Effective/Horizontal Unknown | 588.9mm |
| Top Tube Slope | 20deg |
| Head Tube Angle | 67deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 105mm |
| Bottom Bracket Drop | 60mm |
| Bottom Bracket Height | 312mm |
| Chainstay Length | 440mm |
| Chainstay Length Horizontal | 435.9mm |
| Front-Center | 683.4mm |
| Front-Center Horizontal | 680.7mm |
| Wheelbase | 1116.6mm |
| Fork Offset/Rake | 45mm |
| Trail | 109mm very high |
| Mechanical Trail | 100.3mm |
| Wheel Flop | 39.2mm |
| Standover Height | 735mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 141.4mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 142mm |
ST (Frame Only) Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.4in |
| Tire Outer Diameter | 743.9mm |
| Bike Length with Tires | 1860.5mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 100mm |
| Suspension Sag | 20% |
| Frame Material | Steel |
| Fork Material | Unknown |
| Brake Type | Disc |
| Features | Single-speed capable |
Published Sizing Recommendations
| Height | 158 cm to 173 cm |
Source:https://alpkit.com/products/broken-road-st-frame