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Buy a Big Dummy at JensonUSA

Surly Big Dummy



A couple years ago, Xtracycle contacted us to ask if we might be interested in producing a cargo "longbike" designed around the modular components used on their FreeRadical system. As owners of Xtracycles and supporters of the Xtracycle company ideals, we are excited to add this new frame...the Big Dummy to the Surly product mix.

What does a Big Dummy do? Using Xtracycle plug-in components, it hauls your groceries, tools, human and animal friends, surfboard, work duds, briefcase, vacuum cleaner, firewood, moonshine, camping gear, banjo, mulch, and anything else you can imagine, while providing the functionality, durability, and sweet ride characteristics that Surly bikes are known for. Use the Big Dummy for commuting to work, running errands, taking the kids to school, farm/yard work, touring, or just riding around cuz it's fun.

What are some advantages of the Big Dummy vs. other cargo carrying systems? 1) It's shorter than a bike + trailer system, so it can be easier to maneuver through traffic. 2) Compared to messenger bag or backpack, it won't put strain on your back and shoulders. 3) Two wheels, vs. three or four on a bike + trailer system, keep rolling resistance, rotating mass, and overall weight to a minimum. 4) A longer-than-average wheelbase makes it predictable and comfortable for the long haul. 5) It offers more cargo capacity than a bike + rack system, while keeping most of the weight low and centered between the wheels for increased stability. 6) It's modular and versatile. You only have to carry the accessories that are needed for your task. 7) It rides like a bike, on- and off-road. No trailer-induced death sway, no weird front-end shimmy. We've got lots more info about the Big Dummy's finer points in our Spews section, on the blog page.

Like our other frames, the Big Dummy is built from 4130 CroMoly steel. We designed it to be torsionally rigid while offering some vertical compliance. The Big Dummy features disc caliper mounts and cantilever brake pivots, clearance for 26 x 2.5" tires and fenders, multiple water bottle cage mounts, and a kickstand mount. Set it up with mountain components, road components, or a mixture of both. There are no chainring clearance limitations - except the ground, so you can gear it as high or low as you like. The included 425mm axle-to-crown CroMoly fork can be swapped out for an 80mm-travel suspension fork without radically altering the steering geometry. Frames are available in 16, 18, 20, and 22" sizes (center of bottom bracket to top of top tube).

We only sell the Big Dummy as a frame/fork set…not as a complete bike, so you have the opportunity to pick the components and Xtracycle accessories that best fit your needs. Your local bike shop can help you with selecting frame and component sizes, choosing and ordering parts, and assembling your rig if you don't have the tools and know-how to do so. Xtracycle components are available through Xtracycle directly and through your local bike bike shop via QBP, our US distributor.

Go to to learn more about sport utility bicycles and all of the accessories available for the Big Dummy.
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100% Surly 4130 CroMoly steel. Main triangle double-butted. TIG-welded

Rear dropouts:

Vertical, 135mm spaced with fender eyelets

Brake compatibility:

International Standard disc or cantilever rim-type


Four water bottle mounts, guides for continuous brake/shift housing or brake hydraulic line…top tube and seatstay routing, fender eyelets

Seatpost diameter:


Seatpost clamp diameter:

30mm Surly stainless, included


1-1/8" threadless

Front Derailleur:

28.6mm (1-1/8") clamp diameter, top-pull style

Bottom bracket shell:

68mm wide, threaded English 1.37 x 24t

Tire clearance:

26 x 2.5" with fenders

Chainring clearance:

No frame limitations. Use whatever you want


TIG-welded 4130 CroMoly, suspension-corrected (80mm travel), tapered straight blade with single fender eyelet on the dropout, 1-1/8" x 260mm threadless steerer, International Standard disc mount, removable cantilever pivots, disc brake line/housing guides


Military Green

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Official Surly Page

Users who contributed to this page



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Leave Your Comments

March 20, 2008
I've been riding one of these for a week now and am very impressed. I haven't been able to max out how much I can carry on it yet.

March 22, 2008
I'd love to see pictures of one of these, fully loaded.

April 18, 2008
Fantastic bike if you need the hauling capacity. Kona and Yuba make utility bikes symilar to this one too.

April 30, 2008
Along with the X-tra cycle, this is on my short list. I've really been curious if one of the long-frame bikes could support a couple of small guitar amps, eliminating my need to drive to band practice. My kids are partial to this particular long-frame, largely because of the name. I can't say I disagree.

May 1, 2008
I've had my Big Dummy for about a month now and am really pleased. It's heavy but the weight isn't too noticeable until large hills appear. I comfortably cruise at 25km/h and did a 80km ride on it at an average speed of 22km/h (carrying maybe 25 pounds of gear). So no rocket ship but reasonable. There is a bit of weird flex during standing up to sprint but other than that it rides more or less like a normal bike. Overall its been really fun, I love having a bicycle with a trunk.

July 8, 2010
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August 16, 2010
It's heavy but the weight isn't too noticeable until large hills appear. I comfortably cruise at 25km/h and did a 80km ride on it at an average speed of 22km/h (carrying maybe 25 pounds of gear). So no rocket ship but reasonable. There is a bit of weird flex,business cards printing during standing up to sprint but other than that it rides more or less like a normal bike.

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