Big Dummy


Big Dummy line art

Complete Bike Views

Frame & Detail Views

Complete & Frame

Surly 4130 CroMoly steel. Main triangle double-butted. TIG-welded cargo specific engineered for stiffness and durability

Rear Dropouts
Vertical, 135mm spaced with fender eyelets; Rohloff compliant

Brake Compatibility
51mm disc mounts and removable cantilever pivots

Quad water bottle mounts, Surly Trip Guides for continuous brake/shift housing or brake hydraulic line (toptube and seatstay routing), fender eyelets

Seatpost diameter

Seatpost clamp diameter

1-1/8˝ threadless

Front Derailleur Clamp Diameter
28.6mm (1-1/8˝) clamp diameter, top-pull style

Bottom bracket shell
73mm wide, threaded English 1.37˝ x 24t

Chainring Clearance
No frame limitations. Use whatever you want

Tire Clearance
26 x 2.5˝ with fenders

TIG-welded 4130 CroMoly, tapered and butted straight blade with single fender eyelet on the dropout, 1-1/8˝ x 260mm threadless steerer, 51mm IS disc mount, removable cantilever pivots, line/housing guides

Asphault Gray

Cargo Weight Limit
400 lb combined rider and cargo. Max cargo 200 lb

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