2026 Soma Fabrications Alta Vista Base XS
Build
650B/27.5 in × 2.1 in
Insights
Somewhat upright stack and reach vs trend of all-road/gravel bikes
Stack and Reach vs. Category Trend
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Geometry
| Stack | 571mm |
| Reach | 371mm |
| Stack to Reach Ratio | 1.54:1 |
| Seat Tube Length, C-T | 420mm |
| Top Tube Length, Effective/Horizontal Center | 540mm |
| Top Tube Slope | 19deg |
| Head Tube Angle | 69.5deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 145mm |
| Bottom Bracket Drop | 70mm |
| Bottom Bracket Height | 275.3mm |
| Chainstay Length | 440mm |
| Chainstay Length Horizontal | 434.4mm |
| Front-Center | 615mm |
| Front-Center Horizontal | 611.6mm |
| Wheelbase | 1046mm |
| Fork Offset/Rake | 49.9mm |
| Fork Length (Axle-To-Crown) | 400mm |
| Trail | 75.8mm high |
| Mechanical Trail | 71mm |
| Wheel Flop | 24.9mm |
| Standover Height | 681mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 99.7mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 105.3mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.1in |
| Tire Outer Diameter | 690.7mm |
| Bike Length with Tires | 1736.7mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Flat Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Rim |
Source:www.somafab.com