Big Dummy
Longtail Cargo Bike for Pavement
$2249 USD / $3099 CAD
Surly Bikes
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Big Dummy is a long-tail cargo bike that expands what’s possible by bike.
Take Your Longtail Bike Anywhere
Since its introduction in 2008, many a family have ditched one or both of their cars thanks to Big Dummy. We’ve also seen many entrepreneurs and small business owners minimize their carbon footprint and incorporate Big Dummy into their business model.
Big Dummy is the ultimate grocery getter, the modern day mini-van, the company car, and a human-powered car replacement. It’s all those things and more in that there’s no limit to what it can haul — as long as it falls within the 400-pound weight limit.
- Dedicated single-piece frame increases stiffness and decreases torsional flex
- Human cargo compliant with the use of Dummy Rail Collars
- Vertical, 135mm spaced dropouts with fender eyelets; Rohloff compliant
- Clearance for 26" x 2.5" tires with fenders
Bike Capabilities
- 5/5 with Car Replacement Car Replacement: 5 out of 5
- 5/5 with Passengers Passengers: 5 out of 5
- 3/5 with Off Road Off Road: 3 out of 5
- 5/5 with Trailer Compatibility Trailer Compatibility: 5 out of 5
NOTE: You can ride your bike wherever the hell you want, but this is what we think this bike is best at.
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Where to Buy
Specifications
Frameset
- Frame
-
Surly Big Dummy, Surly 4130 Chromoly steel. Main triangle double-butted. TIG-welded cargo specific engineered for stiffness.
- Fork
-
Surly Troll 420mm axle-to-crown x 43mm offset, tapered and butted straight blade, 4130 Chromoly. 51mm I.S. disc mount
- Seatpost Clamp
- Surly Stainless, 30mm Surly stainless, included
Components
- Headset
- Cane Creek 40
- Brakes
- Avid BB7
- Brake Levers
- Avid FR-5
- Rotors
- SRAM Centerline 180/180mm
- Shifters
- X5 Trigger
- Stem
- 4 Bolt 31.8mm clamp
- Handlebar
- Premetec
- Grip/Tape
- Velo Non-Locking
- Saddle
- WTB Volt Sport
- Seatpost
- 2 -Bolt. 27.2mm
Drivetrain
- Crankset
- TruVativ 48/36/26
- Bottom Bracket
- SRAM
- Front Derailleur
- Shimano Deore, FD-T611-3
- Rear Derailleur
- SRAM GX Type 2.1
- Cog or cogset
- Microshift CS-H100 10 speed, 11-36t
- Chain
- KMC X10
Wheels
- Front Hub
- Shimano Deore M525, 36h, QR
- Rear Hub
- Shimano Deore M525, 36h, QR
- Rims
- Alex Adventurer
- Tires
- Schwalbe Big Apple 26" x 60mm
Complete bike spec subject to change
units:
| SIZE | Small (16) | Medium (18) | Large (20) | xLarge (22) |
|---|---|---|---|---|
| Reach | 15.7 399.6 | 16.5 418.1 | 17.0 431.7 | 17.5 444.1 |
| Stack | 22.3 566.5 | 22.8 580.0 | 23.4 594.1 | 24.1 611.3 |
| Head Tube Angle | 72.0° | 72.0° | 72.0° | 72.0° |
| Head Tube Length | 5.2 131.7 | 5.7 145.9 | 6.3 160.8 | 7.0 178.8 |
| Seat Tube Length | 16.0 406.4 | 18.0 457.2 | 20.0 508.0 | 22.0 558.8 |
| BB Drop | 1.6 40.0 | 1.6 40.0 | 1.6 40.0 | 1.6 40.0 |
| Wheelbase | 56.5 1435.9 | 57.4 1458.8 | 58.1 1477.0 | 58.9 1495.0 |
| Chainstay Length | 32.6 827.0 | 32.6 827.0 | 32.6 827.0 | 32.6 827.0 |
| Top Tube Length, Actual | 21.7 550.6 | 22.4 570.1 | 23.2 588.7 | 24.0 609.6 |
| Top Tube Length, Effective | 22.6 573.5 | 23.5 596.1 | 24.2 614.1 | 24.9 631.8 |
| Seat Tube Angle | 73.0° | 73.0° | 73.0° | 73.0° |
| Standover Height | 29.1 740.4 | 30.4 771.5 | 31.6 802.9 | 32.9 835.8 |
| Stem Length | 3.1 80 | 3.5 90 | 3.9 100 | 4.3 110 |
| Stem Angle | 7° | 7° | 7° | 7° |
| Handlebar Width | 27.6 700 | 29.5 750 | 29.5 750 | 29.5 750 |
| Crank Length | 6.7 170 | 6.9 175 | 6.9 175 | 6.9 175 |
| Fork Length | 16.5 420 | 16.5 420 | 16.5 420 | 16.5 420 |
| Fork Rake | 1.7 43.0 | 1.7 43.0 | 1.7 43.0 | 1.7 43.0 |
- Frame Construction
4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded
- Fork Construction
4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, ED coated
- Rear Dropout Configuration
Vertical
- Rear Hub Spacing
10 x 135mm
- Front Hub Spacing
10 x 100mm
- Rear Brake
Disc - 51mm I.S. (203mm max rotor)
Rim - Canti (removable posts)
- Front Brake
Disc - 51mm I.S. (203mm max rotor)
Rim - Canti (removable posts)
- Head Tube
Ø34mm
- Steerer Tube
Ø28.6mm (1-1/8")
- Crown Race
Ø30mm (1-1/8")
- Stock Headset Upper (S.H.I.S.)
EC34/28.6
- Stock Headset Lower (S.H.I.S.)
EC34/30
- Seat Collar
Ø30mm
- Seatpost
Ø27.2mm
- Front Derailleur (Clamp)
Top-pull (Ø28.6mm)
- Max Chainring (CL)[3]
No frame limitations
- Bottom Bracket
68mm threaded (1.37" x 24TPI)
- Tire Clearance Frame [1]/[2]
26 x 2.5" (w/ fenders)
- Tire Clearance Fork [1]
26 x 3.0"
- Rigid Fork Spec
420 x 43mm
- Max Suspension Fork Length [4]
N/A
- Bottle Mounts Frame
4 Standard
- Bottle Mounts Fork
4 Three-Pack
- Rack Mounts Frame
Yes (Surly Dummy Rails)
- Rack Mounts Fork
Yes (upper, lower, and mid-blade threaded)
- Fender Mounts Frame
Yes
- Fender Mounts Fork
Yes
- Other Features
Kickstand plate
Dedicated Rohloff cable routing and mount for OEM 2 axle plate
[1] Different tire and rim combinations will result in different clearances.
[2] Depending on drivetrain configuration, tire clearance may be limited by the chain and not frame.
[3] Listed chainring clearance is worst case scenario. Clearances vary widely depending on components and configurations.
[4] Suspension fork length listed at full extension (not at sag)
FAQ & Reviews
Support
Downloads
- Big Dummy Frame Sheet
[pdf] - 380KB - Surly Bike Sizing Chart
[pdf] - 308KB - Rail Instructions
[pdf] - 243KB - Rail Collar Instructions
[pdf] - 580KB - Big Dummy/Big Fat Dummy Frame Insert Instructions
[pdf] - 122KB - Dummy Deck Instructions
[pdf] - 695KB - Dummy Bag Instructions
[pdf] - 2.4MB - Bicycle Owner’s Manual (English)
[pdf] - 1.2MB
Frame Warranty
LIMITED WARRANTY
This Surly product is warranted against defects in materials and workmanship for three years from the date of retail purchase of the product, subject to the limitations detailed below. Save your dated receipt for proof of purchase.
This warranty does NOT cover the following:
- Damage due to improper assembly or follow-up maintenance or lack of skill, competence or experience of the user or assembler
- Products that have been modified, neglected, used in competition or for commercial purposes, misused or abused, involved in accidents or anything other than normal use
- Installation of components, parts or accessories not originally intended for or compatible with bicycle as sold
- Damage or deterioration to the paint, surface finish, aesthetics or appearance of the product
- Normal wear and tear
- Labor required to remove and/or refit and re-adjust the product within the bicycle assembly
This limited warranty is expressly limited to the repair or replacement of a defective product, at the option of Surly, and is the sole remedy of the warranty. This limited warranty applies only to the original purchaser of the Surly product and is not transferrable. This warranty applies only to products purchased through an authorized dealer or distributor. In no event shall Surly be liable for any loss, inconvenience or damage, whether direct, incidental, consequential, or otherwise resulting from breach of any express or implied warranty or condition, of merchantability, fitness for a particular purpose, or otherwise with respect to our products except as set forth herein.
This limited warranty gives the consumer specific legal rights, and those rights and other rights may vary from place to place. This limited warranty does not affect your statutory rights.
TO THE EXTENT NOT PROHIBITED BY LAW, THESE WARRANTIES ARE EXCLUSIVE AND THERE ARE NO OTHER EXPRESS OR IMPLIED WARRANTIES OR CONDITIONS INCLUDING WARRANTIES OR CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.