2023 Soma Fabrications Jawbone A-Type Base 56
Build
700C/29 in × 47 mm
Insights
Somewhat upright stack and reach vs trend of off-road touring bikes
Design deviates from other sizes of Soma Fabrications Jawbone A-Type
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 623mm |
| Reach | 379mm |
| Stack to Reach Ratio | 1.64:1 |
| Seat Tube Length, C-T | 525mm |
| Top Tube Length, Effective/Horizontal Center | 569mm |
| Top Tube Slope | 12.8deg |
| Head Tube Angle | 71deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 185mm |
| Bottom Bracket Drop | 72mm |
| Bottom Bracket Height | 286mm |
| Chainstay Length | 445mm |
| Chainstay Length Horizontal | 439.1mm |
| Front-Center | 631mm |
| Front-Center Horizontal | 626.9mm |
| Wheelbase | 1066mm |
| Fork Offset/Rake | 50mm |
| Fork Length, Unknown | 420mm |
| Trail | 70.4mm high |
| Mechanical Trail | 66.6mm |
| Wheel Flop | 21.7mm |
| Standover Height | 827mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 103mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 116mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 47mm |
| Tire Outer Diameter | 716mm |
| Bike Length with Tires | 1782mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Disc |
Source:https://www.somafab.com/archives/product/jawbone-frame-a-type