Surly Big Dummy

Big Dummy is one of those cargo bikes that seem to be getting so much attention lately. Actually, the Big Dummy has been around for quite a while now. It’s 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 Surly 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. This may seem obvious, but as you get comfy with it you’ll use your full range of gears as never before.

The parts kit is good quality, and suitable to loaded as well as unloaded riding. It’s got a 3×9 drivetrain, Avid BB7 mechanical disc brakes, Shimano Deore hubs, derailleurs and shifters and 26 x 2.1˝ Continental Town & Country tires. We’ve outfitted it with our own Surly bags, deck and rails kit…everything you need for the majority of stuff you might carry, like groceries, shovels, bags of charcoal or mulch, guitars, lamps, mannequins, whatever. Bags, deck and rails are all designed to improve on previous offerings and work together to make sure your stuff is transported with safety and stability.

The beauty of the Longtail standard is that it is an open design, meaning you can find other stuff to fit the system. Xtracycle in particular makes a lot of great stuff to expand what you can haul and how you can haul it, and many people have manufactured their own plug-in pieces when their needs outstripped what was available. Get creative, and get hauling.


FrameSurly Big Dummy, Surly 4130 CroMoly steel. Main triangle double-butted. TIG-welded cargo specific engineered for stiffness
ForkSurly Big Dummy, TIG-welded 4130 CroMoly, tapered and butted straight bladewith single fender eyelet on the dropout, 1-1/8˝ x 260mm threadless steerer, 51mm IS disc mount, removable cantilever pivots, line/housing guides
Seatpost clampSurly Stainless, 30mm Surly stainless, included

CranksetTruVativ FireX C3.1, Forged aluminum. 48-36-26t. Black
Bottom Bracket68mm, Included
Front DerailleurShimano Deore M591, Traditional style dual pull. 28.6mm clamp
Rear DerailleurShimano Deore, M591 SGS. Top-normal traditional
Cog or CassetteShimano HG-61, 11–34t
ChainSRAM PC-971, 9-speed

HeadsetCane Creek 40, 1-1/8˝ threadless. Black
BrakesAvid BB7, Cable actuated. 180mm rotors front & rear
Brake LeversAvid FR-5, Black
ShiftersShimano Deore M590, 3 x 9-speed
StemKalloy, AS-008, 25.4mm bar clamp. Aluminum. 4-bolt. Black
HandlebarSalsa MotoAce, 660mm wide. 17°. Black
SaddleWTB SST Comp, Steel rails. Black vinyl. Feels pretty o.k.
SeatpostKalloy SP-342, 27.2mm. 350mm. Black

Front HubShimano Deore M529, 36h. Disc. Black
Rear HubShimano Deore M529, 36h. Disc. Black
RimsAlex Adventurer, 36h. Black w/machined sidewalls
SpokesDT Swiss Champion, 14g
TiresContinental Town & Country, 26 x 2.1˝. Steel bead
Frame Size Stem Length Stem Angle Handlebar Width Crank Length
Small 3.5 7.0 26.0 170.0
Medium 3.9 7.0 26.0 175.0
Large 4.3 7.0 26.0 175.0
xLarge 4.7 7.0 26.0 175.0

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