Surly Big Dummy
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Surly Big Dummy Surly Big Dummy Surly Big Dummy Surly Big Dummy Surly Big Dummy

Surly Big Dummy

Product Code BKAHBD3235
Other products by Surly


    NOTE: Price applies to Online sales only, pricing may differ in our Retail store.
  • Availability: In our warehouse or with the distributor. Expect delivery in 2-3 days.
  • This item comes with free shipping.


Big Dummy is built around the Longtail standard design platform, which means that Xtracycle or Surly accessories can be added depending on what you want to carry, or you can build your own to meet whatever hauling needs you have. However, being a dedicated single-piece frame instead of an add-on to an existing bike, it’s more stout and resistant to torsional flex, and this makes it ride better and last longer than longbike add-ons.

Like all our frames, it’s made of steel and sports lots of little touches that you’ve come to love in a Surly, like clearance for bigger tires and common component sizing. Figure on being able to carry about 200 pounds (90kg) of cargo. The load weight, and how it’s loaded, will affect the handling somewhat. Also, plan on using gears, especially as cargo weight increases.

We’ve outfitted it with our own Surly bags, deck and rails kit…everything you need for the majority of stuff you might carry.

Frame Surly Big Dummy, Surly 4130 CroMoly steel. Main triangle double-butted. TIG-welded cargo specific engineered for stiffness
Fork Surly Big Dummy, 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
Seatpost clamp Surly Stainless, 30mm Surly stainless, included
Crankset Shimano LX FC-T551, Forged aluminum. 48-36-26t. Black
Bottom Bracket 68mm, Included
Front Derailleur Shimano FD-T610 Top swing, dual pull, w/ direct mount adaptor
Rear Derailleur Shimano Deore M615 SGS, Top-normal traditional
Cog or Cassette Shimano CS-HG50-10, 11/36t
Chain KMC, 10-speed
Headset Cane Creek 40, 1-1/8" threadless. Black
Brakes Avid BB7, Cable actuated. 180mm rotors front & rear
Brake Levers Avid FR-5, Black
Shifters Shimano Deore M610, 3 x 10-speed
Stem HL, 31.8mm bar clamp. 4-bolt. Black
Handlebar Salsa Salt Flat, 31.8mm 700/750mm
Saddle Velo VL-2155, Steel rails. Black vinyl. Feels pretty o.k.
Seatpost Kalloy SP-342, 27.2mm. 350mm. Black
Front Hub Shimano Deore M525, 36h. Disc. Black
Rear Hub Shimano Deore M525, 36h. Disc. Black
Rims Alex DH-19, 36h. Black w/machined sidewalls
Spokes DT Swiss Champion, 14g
Tyres Continental Town & Country, 26 x 2.1 Steel

*Specifications subject to change

Geometry (in) Small (16) Medium (18) Large (20) xLarge (22)
Seat Tube Length
16.0 18.0 20.0 22.0
Top Tube Length
21.7 22.4 23.2 24.0
Effective Top Tube Length
22.6 23.5 24.2 24.9
Head Tube Angle 72.0 72.0 72.0 72.0
Seat Tube Angle 73.0 73.0 73.0 73.0
BB Drop 1.6 1.6 1.6 1.6
Chainstay Length 32.6 32.6 32.6 32.6
Wheelbase 56.5 57.4 58.1 58.9
Standover Height 29.1 30.4 31.6 32.9
Head Tube Length 5.2 5.7 6.3 7.0
Fork Length 16.7 16.7 16.7 16.7
Fork Offset 1.7 1.7 1.7 1.7
Stack 22.3 22.8 23.4 24.1
Reach 15.7 16.5 17.0 17.5

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