2019 Surly Bikes Big Fat Dummy Base MD
Build
700C/29 in × 3 in
Stack and Reach vs. Category Trend
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Geometry
| Stack | 597mm |
| Reach | 432mm |
| Stack to Reach Ratio | 1.38:1 |
| Seat Tube Length, C-T | 432mm |
| Top Tube Length, Effective/Horizontal Center | 620mm |
| Top Tube Slope | 18.2deg |
| Head Tube Angle | 69deg |
| Seat Tube Angle | 72.5deg |
| Head Tube Length | 120mm |
| Bottom Bracket Drop | 55mm |
| Bottom Bracket Height | 332.2mm |
| Chainstay Length | 875mm |
| Chainstay Length Horizontal | 873.3mm |
| Front-Center | 691.9mm |
| Front-Center Horizontal | 689.7mm |
| Wheelbase | 1563mm |
| Fork Offset/Rake | 47mm |
| Fork Length (Axle-To-Crown) | 468mm |
| Trail | 98.3mm very high |
| Mechanical Trail | 91.8mm |
| Wheel Flop | 32.9mm |
| Standover Height | 790mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 134.7mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 162.2mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 3in |
| Tire Outer Diameter | 774.4mm |
| Bike Length with Tires | 2337.4mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Flat Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Disc |
Source:https://surlybikes.com/bikes/big_fat_dummy/bike_info