2026 Rocky Mountain Vertex Jr. 20 Base 20
Build
20 in (406) × 2.4 in
Insights
Stack and Reach vs. Category Trend
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Geometry
| Stack | 428mm |
| Seat Tube Length, C-T | 255mm |
| Top Tube Length, Effective/Horizontal HT Top | 470mm |
| Head Tube Angle | 68deg |
| Seat Tube Angle | 71deg |
| Head Tube Length | 100mm |
| Bottom Bracket Drop | 15mm |
| Bottom Bracket Height | 249mm |
| Chainstay Length Horizontal | 347mm |
| Front-Center | 525.2mm |
| Front-Center Horizontal | 525mm |
| Wheelbase | 872mm |
| Fork Offset/Rake | 40mm |
| Trail | 63.5mm mid/neutral |
| Mechanical Trail | 58.9mm |
| Wheel Flop | 22.1mm |
| Standover Height | 200mm |
| Tire to Pedal Spindle Distance With 127 mm cranks | 134.3mm |
| Pedal Spindle to Ground Clearance With 127 mm cranks | 122mm |
Base Build
| Wheel Size | 20 inch (406 BSD, BMX/Kids) (406mm BSD) |
| Tire Width | 2.4in |
| Tire Outer Diameter | 527.9mm |
| Bike Length with Tires | 1399.9mm |
| Crank Length | 127mm |
| Handlebar Width | 600mm |
| Stem Length | 40mm |
| Stem Angle | 7deg |
| Suspension Type | Rigid, suspension corrected |
| Bar Type | Flat Bar |
| Frame Material | Aluminum |
| Fork Material | Aluminum |
| Brake Type | Disc |
Source:bikes.com