Surly Big Dummy

5.0 stars
 (2 Reviews)
Double-tap to zoom in


Big Dummy is a long-tail cargo bike, which means that not only can you haul a serious amount of cargo, different accessories can be added to your Big Dummy frame and deck depending on what you want to carry. Being a dedicated single-piece frame, instead of an add-on to an existing bike, it’s stiffer and resistant to torsional flex, which provides a better ride and longer lasting frame than long-tail add-ons.

The frame is made of CroMoly steel – a tube set engineered for cargo that sports lots of little touches that you’ve come to love in a Surly, like clearance for big tires and the use of common component sizes. 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 will use your full range of gears as never before.

It’s got a 3x10 drivetrain, Avid BB7 disc brakes, quality Shimano Deore hubs, and 26x3" Kenda Kiniption tires. Surly has outfitted it with bags, deck, rails and Dummy Rail Collars; 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, rails, and rail collars are all designed to improve on previous offerings and work together to make sure your stuff is transported with safety and stability. It’s an unbending interface, which when you’re carrying lots of cargo, is a good thing to have. Get creative, and get hauling.

Features & Info

Geometry chart

Surly Big Dummy geometry chart

Plus-size rims and tires

Plus size rims and tires

Pedals sold separately

Consumer Reviews

5.0 stars

(2 reviews)

100% of respondents would recommend this to a friend.


  • Versatile  (2)
  • Durable 
  • Handles Well 
  • It's surprisingly fast 
  • Smooth Ride 
  • Great Components 


  • Presta valves 
  • Two weeks to turn around 
  • Heavy 

Best Uses

  • Free Riding 
  • Cross Country 
  • Downhill 
  • Casual Trails 
  • Hauling lots of stuff 

May 12, 2012

My Big Dummy ROCKS

Durable, Versatile, It's surprisingly fast, I can haul a lot
Heavy, Two weeks to turn around, Presta valves
Best Uses:
Hauling lots of stuff
It has been a grocery getter and a casual ride bike. It is now my bike to campsite bike. I take it out as much as I do the other bikes because I simply like the way that it shifts and stops. I thank you guys for letting me test drive it. I fell in love instantly.
by Commander Salek from Arlington, TX

Sep 15, 2009

Best Commuter Bike!

Versatile, Rugged, Smooth Ride, Handles Well, Great Components
Best Uses:
Cross Country, Casual Trails, Downhill, Free Riding
Love the bike! Going to the store this is the bike!!
by Sissybarboy from Newark,CA


Surly Big Dummy, Surly 4130 CroMoly steel. Main triangle double-butted. TIG-welded cargo specific engineered for stiffness.
Surly Big Dummy, TIG-welded 4130 CroMoly
Cane Creek 40,
Alex Adventurer
Kenda 26x3" Kiniption, 60tpi
FC Firex C3.1
Bottom Bracket
Surly Enduro
KMC X10,
Front Derailleur
Shimano Deore, FD-T611-3
Rear Derailleur
SRAM GX, 10-speed TYPE 2.1
Rear Cogs
Microshift CS-H100 10-speed, 11-36t
X7 Trigger
H.L., 31.8mm
Brake Levers
Avid FR-5
Avid BB7, Centerline 180mm rotors front & rear
WTB Volt Sport
Seat Post
Kalloy SP-342