2012 Soma Fabrications San Marcos Base 51
Build
650B/27.5 in × 28 mm
Insights
Very upright stack and reach vs trend of sport touring bikes
Design deviates from other sizes of Soma Fabrications San Marcos
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 578mm |
| Reach | 356mm |
| Stack to Reach Ratio | 1.62:1 |
| Seat Tube Length, C-T | 510mm |
| Top Tube Length, Effective/Horizontal Center | 550mm |
| Top Tube Slope | 10.3deg |
| Head Tube Angle | 71deg |
| Seat Tube Angle | 71.5deg |
| Head Tube Length | 184mm |
| Bottom Bracket Drop | 65mm |
| Bottom Bracket Height | 255mm |
| Chainstay Length | 445mm |
| Chainstay Length Horizontal | 440.2mm |
| Front-Center | 591.4mm |
| Front-Center Horizontal | 587.8mm |
| Wheelbase | 1028mm |
| Fork Offset/Rake | 52mm |
| Fork Length (Axle-To-Crown) | 369mm |
| Trail | 55.2mm mid/neutral |
| Mechanical Trail | 52.2mm |
| Wheel Flop | 17mm |
| Standover Height | 769.6mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 101.4mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 85mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 28mm |
| Tire Outer Diameter | 640mm |
| Bike Length with Tires | 1668mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Rim |
Source:http://www.somafab.com/archives/product/san-marcos-frame-set