2021 v.3 Disc Soma Fabrications Grand Randonneur Base 55
Build
650B/27.5 in × 42 mm
Insights
Design deviates from other sizes of Soma Fabrications Grand Randonneur
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 571mm |
| Reach | 391mm |
| Stack to Reach Ratio | 1.46:1 |
| Seat Tube Length, C-T | 550mm |
| Top Tube Length, Effective/Horizontal Center | 560mm |
| Top Tube Slope | 4.6deg |
| Head Tube Angle | 72.5deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 165mm |
| Bottom Bracket Drop | 65mm |
| Bottom Bracket Height | 269mm |
| Chainstay Length | 430mm |
| Chainstay Length Horizontal | 425.1mm |
| Front-Center | 622mm |
| Front-Center Horizontal | 617.9mm |
| Wheelbase | 1043mm |
| Fork Offset/Rake | 65mm |
| Trail | 37.2mm low |
| Mechanical Trail | 35.4mm |
| Wheel Flop | 10.7mm |
| Standover Height | 789.9mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 118mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 99mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 42mm |
| Tire Outer Diameter | 668mm |
| Bike Length with Tires | 1711mm |
| 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/grand-randonneur-frame-set