Velopedia Bicycle Archive
Surly Big Dummy Frameset - Twilight Zone
Cargo bicycle from the Velopedia specification archive.
- Model year
- Not published by manufacturer
- Original MSRP
- $1,999.00
- Sizes
- Small; Medium; Large
- Colors
- Twilight Zone
- Geometry
- 3 manufacturer sizes
- Archive ID
- 900000474
- Catalog verified
- August 13, 2026
Current market
0 close matches
Used asking
No listingsNo close matches in this condition.
New asking
No listingsNo close matches in this condition.
View market details Frameset
| Frame Construction | 4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded |
|---|---|
| Frame Material | Steel |
| Fork | Surly Cocktail Fork - 4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, E.D. coated |
| Fork Material | Steel |
Wheels & Tires
| Wheel Size | 26" |
|---|
Size-specific frame data
Geometry
Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.
| Measurement | Small | Medium | Large |
|---|---|---|---|
| Seat tube | 406 mm | 432 mm | 508 mm |
| Effective top tube | 590 mm | 620 mm | 645 mm |
| Head tube | 150 mm | 180 mm | 210 mm |
| Head-tube angle | 70° | 70° | 70° |
| Seat-tube angle | 72.5° | 72.5° | 72.5° |
| Chainstay / rear center | 821 mm | 821 mm | 821 mm |
| Wheelbase | 1469 mm | 1500 mm | 1527 mm |
| Bottom-bracket drop | 40 mm | 40 mm | 40 mm |
| Bottom-bracket height | 299 mm | 299 mm | 299 mm |
| Reach | 410 mm | 431 mm | 447 mm |
| Stack | 571 mm | 599 mm | 627 mm |
| Standover height | 725 mm | 773 mm | 823 mm |
| Fork offset / rake | 43 mm | 43 mm | 43 mm |
| Fork length / axle-to-crown | 418 mm | 418 mm | 418 mm |
| Crank length | 165 mm | 170 mm | 170 mm |
| Stem length | 70 mm | 70 mm | 80 mm |
| Handlebar width | 718 mm | 735 mm | 735 mm |
Geometry source: Manufacturer HTML geometry table ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Gallery
Live marketplace data
Current Market Snapshot
Current eBay asking prices from listings that closely match this bicycle's brand and model. New and used listings are kept separate.
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No close current matches found. Velopedia did not find an eBay listing confident enough to include in the latest snapshot.
Active asking prices are not completed-sale prices or an appraisal. Only Velopedia's high-confidence matches are included; lower-confidence Review candidates are excluded. Browse all current matched listings.
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.