Surly Big Fat Dummy - 2019

Surly Big Fat Dummy
  • Color: Bliolet
  • Color: Bliolet
  • Color: Thorfrost White
  • Color: Thorfrost White
  • Color: Thorfrost White
  • Color: Thorfrost White
  • Color: Thorfrost White
$3,025.00
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Details

The Big Fat Dummy is a long tail cargo bike that took a few too many doses of growth hormones. At first glance, you might say that Surly just put bigger tires on a Big Dummy. But if you said that, you'd actually be very wrong so just… don't. Think of Big Fat Dummy as more of a second or third cousin to Big Dummy rather than a brother. They share some of the same DNA and look sort of similar, but they're two very different bikes and really only interact when they both reach for the potato salad spoon at that family reunion that no one really wants to be at anyway.

Now that that's out of the way, let's get down to the nitty gritty of what makes this hulking beast of a bike tick. Surly's goal with designing a cargo bike around fat tires was to create the most stable, stiff, and traction-laden ride possible while hauling a ton of stuff. Big Fat Dummy has a longer toptube and slacker headtube than its more svelt cousin giving it a nice, predictable, and stable ride. They also used thinner, lighter tubing to construct its cargo area so while it's an overall burlier bike, there's not much difference in weight.

Big Fat Dummy accepts either 10mm or 12mm axles in the rear with a spacing of 190/197mm. That big ol' spacing equates to one thing: tire clearance for days. Big Fat Dummy maxes out at a massive 26 x 5.25" tire.* While that large of a tire provides the most traction and stability a bike can possibly offer, it's also a lot of rubber to push and might not be for everybody. Luckily, Big Fat Dummy is also a blast to ride with 3" tires too. It uses the same 100mm suspension-corrected fork as the Wednesday, meaning if you want to add a little squishy squishy to your ride, you can throw a Bluto on and let ‘er rip.

If you intend to carry a passenger on your Big Fat Dummy, Surly requires use of their Dummy Rail Collars. These provide a secondary retention system for the rack, as well as stiffen the rack system. In addition, a stoker handlebar set up, found on tandem bicycles, is recommended as well. Make sure to check with seat post manufacturer for stoker handlebar compatibility. All Big Fat Dummy framesets and bikes ship with a Dummy deck, rails, bags, and the aforementioned Dummy Rail Collars so you can immediately start hauling cargo — human or otherwise.

Big Fat Dummy is ready and willing to carry all sorts of crap — literally. It's already in use on an organic farm in Ecuador so it's likely that it's hauled some form of manure by now.

*Using a 26 x 5.25" tire will cause some drivetrain limitations.

Specs

Frame Surly 4130 CroMoly steel. Main triangle double-butted. TIG-welded cargo specific engineered for stiffness and durability
Fork Surly Wednesday, Tapered straight blade 4130 CroMoly. 468mm axle to crown, 47mm offset. 51mm I.S. front standard disc mount, 150
Headset Cane Creek 40 series
Axles Front: 150 x 15mm
Rear: 197 x 12mm
Rims/Wheels Surly My Other Brother Darryl
Hubs Salsa, 32h
Tires Surly Edna
Crankset Race Face
Chainrings 36/22t
Bottom Bracket Race Face
Chain KMC X11 anti-rust
Front Derailleur SRAM GX 2x11 high direct mount
Rear Derailleur SRAM GX 2x11 long cage type 2.1
Cassette/Rear Cogs Sunrace 11s 11/42
Shifters SRAM GX 2x11
Handlebars Answer ProTaper
Stem H.L. 31.8mm clamp 4-bolt
Brake Levers SRAM Level T
Brakes SRAM Level T
Saddle WTB Volt
Seat Post H.L. 9mm offset 2 bolt

Part Numbers

Option UPC MPN
Bliolet / Small 708752184893 BK3255
Bliolet / Medium 708752184916 BK3256
Bliolet / Large 708752184930 BK3257
Thorfrost White / Small 708752249783 BK5365
Thorfrost White / Medium 708752249905 BK5366

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