2008 Surly Bikes Big Dummy Base
- Category
- Cargo
- Design
- Flat Bar, Rigid, suspension corrected
- Frame
- Steel
- Fork
- Steel
- Features
- Rim brake
Geometry
Small (16) | SM | Medium (18) | Large (20) | MD | xLarge (22) | LG | |
Stack | 566.5mm | 571.1mm | 580mm | 594.1mm | 599.3mm | 611.3mm | 627.4mm |
Reach | 399.6mm | 409.9mm | 418.1mm | 431.7mm | 431.1mm | 444.1mm | 447.2mm |
Stack to Reach Ratio | 1.42:1 | 1.39:1 | 1.39:1 | 1.38:1 | 1.39:1 | 1.38:1 | 1.4:1 |
Seat Tube Length, C-T | 406.4mm | — | 457.2mm | 508mm | — | 558.8mm | — |
Seat Tube Length, C-TTT | — | 406mm | — | — | 432mm | — | 508mm |
Top Tube Length, Effective/Horizontal Center | 573.5mm | — | 596.1mm | 614.1mm | — | 631.8mm | — |
Top Tube Length, Effective/Horizontal HT Top | — | 590mm | — | — | 620mm | — | 645mm |
Top Tube Length, Actual C-C | 550.6mm | — | 570.1mm | 588.7mm | — | 609.6mm | — |
Top Tube Slope | 22.1deg | 17deg | 16.3deg | 13deg | 16.5deg | 9.4deg | 11.6deg |
Head Tube Angle | 72deg | 70deg | 72deg | 72deg | 70deg | 72deg | 70deg |
Seat Tube Angle | 73deg | 72.5deg | 73deg | 73deg | 72.5deg | 73deg | 72.5deg |
Head Tube Length | 131.7mm | 150mm | 145.9mm | 160.8mm | 180mm | 178.8mm | 210mm |
Bottom Bracket Drop | 40mm | 40mm | 40mm | 40mm | 40mm | 40mm | 40mm |
Bottom Bracket Height | 298mm | 303mm | 298mm | 298mm | 303mm | 298mm | 303mm |
Chainstay Length | 827mm | 821mm | 827mm | 827mm | 821mm | 827mm | 821mm |
Chainstay Length Horizontal | 826mm | 820mm | 826mm | 826mm | 820mm | 826mm | 820mm |
Front-Center | 611.2mm | 650.2mm | 634mm | 652.2mm | 681.6mm | 670.2mm | 707.9mm |
Front-Center Horizontal | 609.9mm | 649mm | 632.8mm | 651mm | 680.4mm | 669mm | 706.8mm |
Wheelbase | 1435.9mm | 1469mm | 1458.8mm | 1477mm | 1500.4mm | 1495mm | 1526.8mm |
Fork Offset/Rake | 43mm | 43mm | 43mm | 43mm | 43mm | 43mm | 43mm |
Fork Length (On-Axis) | 420mm | — | 420mm | 420mm | — | 420mm | — |
Fork Length (Axle-To-Crown) | — | 417.8mm | — | — | 417.8mm | — | 417.8mm |
Trail | 64.6mm mid/​neutral | 79.1mm high | 64.6mm mid/​neutral | 64.6mm mid/​neutral | 79.1mm high | 64.6mm mid/​neutral | 79.1mm high |
Mechanical Trail | 61.5mm | 74.3mm | 61.5mm | 61.5mm | 74.3mm | 61.5mm | 74.3mm |
Wheel Flop | 19mm | 25.4mm | 19mm | 19mm | 25.4mm | 19mm | 25.4mm |
Standover Height | 740.4mm | 725mm | 771.5mm | 802.9mm | 773mm | 835.8mm | 823mm |
Tire to Pedal Spindle | 103.2mm 170 mm cranks | 137.2mm 170 mm cranks | 121mm 175 mm cranks | 139.2mm 175 mm cranks | 163.6mm 175 mm cranks | 157.2mm 175 mm cranks | 189.9mm 175 mm cranks |
Pedal Spindle to Ground Clearance | 128mm 170 mm cranks | 133mm 170 mm cranks | 123mm 175 mm cranks | 123mm 175 mm cranks | 128mm 175 mm cranks | 123mm 175 mm cranks | 128mm 175 mm cranks |
Base Build
Small (16) | SM | Medium (18) | Large (20) | MD | xLarge (22) | LG | |
Wheel Size | 26 in 559 mm BSD | 26 in 559 mm BSD | 26 in 559 mm BSD | 26 in 559 mm BSD | 26 in 559 mm BSD | 26 in 559 mm BSD | 26 in 559 mm BSD |
Tire Width | 60mm | 2.5in | 60mm | 60mm | 2.5in | 60mm | 2.5in |
Tire Width Max | 60mm | — | 60mm | 60mm | — | 60mm | — |
Tire Outer Diameter | 676mm | 686mm | 676mm | 676mm | 686mm | 676mm | 686mm |
Bike Length with Tires | 2111.9mm | 2155mm | 2134.8mm | 2153mm | 2186.4mm | 2171mm | 2212.8mm |
Crank Length | 170mm | 170mm | 175mm | 175mm | 175mm | 175mm | 175mm |
Handlebar Width | 700mm | 718mm | 750mm | 750mm | 735mm | 750mm | 735mm |
Stem Length | 80mm | 70mm | 90mm | 100mm | 70mm | 110mm | 80mm |
Stem Angle | 7deg | 7deg | 7deg | 7deg | 7deg | 7deg | 7deg |
Published Sizing Recommendations
Height | — | 1600 cm to 1778 cm | — | — | 1676 cm to 1829 cm | — | 1778 cm to 1956 cm |
Stack and Reach vs. Category Trend
Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive
The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.
Learn more about the Upright/Aggressive ScaleCategory Trend
CargoSource:https://surlybikes.com/bikes/big_dummy, https://surlybikes.com/bikes/big_dummy#spec-geo