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Surly Big Fat Dummy
  • Color: Bliolet
  • Color: Bliolet

Surly Big Fat Dummy

2018

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$3,025.00
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Product Details

2018 Surly Big Fat Dummy

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.

Features and Information

 
  • Specifications close open

    Specification Description
    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

    * Subject to change without notice.

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  • Part Numbers close open

    Option Barcode Manufacturer's Part Number Vendor Number
    Bliolet / Small 708752184893 BK3255 QBP-BK3255
    Bliolet / Medium 708752184916 BK3256 QBP-BK3256
    Bliolet / Large 708752184930 BK3257 QBP-BK3257
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