Surly Big Dummy Frameset

£1,000.00
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Take Your Longtail Bike Anywhere

Since its introduction in 2008, many a family have ditched one or both of their cars thanks to Big Dummy. We’ve also seen many entrepreneurs and small business owners minimize their carbon footprint and incorporate Big Dummy into their business model.

Big Dummy is the ultimate grocery getter, the modern day mini-van, the company car, and a human-powered car replacement. It’s all those things and more in that there’s no limit to what it can haul — as long as it falls within the 400-pound weight limit.

  • Dedicated single-piece frame increases stiffness and decreases torsional flex
  • Human cargo compliant with the use of Dummy Rail Collars
  • Vertical, 135mm spaced dropouts with fender eyelets; Rohloff compliant
  • Clearance for 26" x 2.5" tires with fenders
Frame Construction

4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded

Fork Construction

4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, ED coated

Rear Dropout Configuration

Vertical

Rear Hub Spacing

10 x 135mm

Front Hub Spacing

10 x 100mm

Rear Brake

Disc - 51mm I.S. (203mm max rotor)

Rim - Canti (removable posts)

Front Brake

Disc - 51mm I.S. (203mm max rotor)

Rim - Canti (removable posts)

Head Tube

Ø34mm

Steerer Tube

Ø28.6mm (1-1/8")

Crown Race

Ø30mm (1-1/8")

Stock Headset Upper (S.H.I.S.)

EC34/28.6

Stock Headset Lower (S.H.I.S.)

EC34/30

Seat Collar

Ø30mm

Seatpost

Ø27.2mm

Front Derailleur (Clamp)

Top-pull (Ø28.6mm)

Max Chainring (CL)[3]

No frame limitations

Bottom Bracket

68mm threaded (1.37" x 24TPI)

Tire Clearance Frame [1]/[2]

26 x 2.5" (w/ fenders)

Tire Clearance Fork [1]

26 x 3.0"

Rigid Fork Spec

420 x 43mm

Max Suspension Fork Length [4]

N/A

Bottle Mounts Frame

4 Standard

Bottle Mounts Fork

4 Three-Pack

Rack Mounts Frame

Yes (Surly Dummy Rails)

Rack Mounts Fork

Yes (upper, lower, and mid-blade threaded)

Fender Mounts Frame

Yes

Fender Mounts Fork

Yes

Other Features

Kickstand plate

Dedicated Rohloff cable routing and mount for OEM 2 axle plate