2013 v.1 Soma Fabrications Grand Randonneur Base 55
Build
650B/27.5 in × 32 mm
Stack and Reach vs. Category Trend
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Geometry
| Stack | 549mm |
| Reach | 397mm |
| Stack to Reach Ratio | 1.38:1 |
| Seat Tube Length, C-T | 550mm |
| Top Tube Length, Effective/Horizontal Center | 560mm |
| Top Tube Slope | 2.2deg |
| Head Tube Angle | 72.5deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 150mm |
| Bottom Bracket Drop | 65mm |
| Bottom Bracket Height | 259mm |
| Chainstay Length | 425mm |
| Chainstay Length Horizontal | 420mm |
| Front-Center | 625mm |
| Front-Center Horizontal | 622mm |
| Wheelbase | 1042mm |
| Fork Offset/Rake | 69mm |
| Trail | 29.8mm very low |
| Mechanical Trail | 28.4mm |
| Wheel Flop | 8.6mm |
| Standover Height | 766mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 131mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 89mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 32mm |
| Tire Outer Diameter | 648mm |
| Bike Length with Tires | 1690mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Rim |
Source:http://somafab.blogspot.com/2013/06/soma-grand-randonneur-official-geometry.html