2023 Surly Bikes Big Dummy Base LG
Build
26 in × 2.5 in
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 627.4mm |
| Reach | 447.2mm |
| Stack to Reach Ratio | 1.4:1 |
| Seat Tube Length, C-TTT | 508mm |
| Top Tube Length, Effective/Horizontal HT Top | 645mm |
| Top Tube Slope | 11.6deg |
| Head Tube Angle | 70deg |
| Seat Tube Angle | 72.5deg |
| Head Tube Length | 210mm |
| Bottom Bracket Drop | 40mm |
| Bottom Bracket Height | 303mm |
| Chainstay Length | 821mm |
| Chainstay Length Horizontal | 820mm |
| Front-Center | 707.9mm |
| Front-Center Horizontal | 706.8mm |
| Wheelbase | 1526.8mm |
| Fork Offset/Rake | 43mm |
| Fork Length (Axle-To-Crown) | 417.8mm |
| Trail | 79.1mm high |
| Mechanical Trail | 74.3mm |
| Wheel Flop | 25.4mm |
| Standover Height | 823mm |
| Tire to Pedal Spindle Distance With 175 mm cranks | 189.9mm |
| Pedal Spindle to Ground Clearance With 175 mm cranks | 128mm |
Base Build
| Wheel Size | 26 inch (559mm BSD) |
| Tire Width | 2.5in |
| Tire Outer Diameter | 686mm |
| Bike Length with Tires | 2212.8mm |
| Crank Length | 175mm |
| Handlebar Width | 735mm |
| Stem Length | 80mm |
| Stem Angle | 7deg |
| Suspension Type | Rigid, suspension corrected |
| Bar Type | Flat Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 148 ft 2 in to 163 ft 0 in |
Source:https://surlybikes.com/bikes/big_dummy#spec-geo