Overview
The Big Dummy is an analog longtail cargo bike meant to make you rethink how you carry all your crap. Since 2008, Big Dummy has helped families cut their car dependency and business owners cut their carbon footprint; it’s helped friends move and hauled the pizza to the party. Saddle this beast up with a month’s worth of groceries, lumber from the hardware store, your tiny humanoids, or anything else under the 400 lb rider + cargo weight limit. Even if you don’t have a heavy load, there’s freedom in just chucking everything you need for the day into the Dummy Bags and knowing you can pick up any #GroundScore you find along the way — pretty smart if you ask us.
Features
100% Surly 4130 Chromoly Natch tubing, double-butted main triangle and fork blades, TIG welded, E.D. coated for rust prevention
Fender eyelets and Surly Trip Guides for continuous brake/shift housing or brake hydraulic lines
Two standard bottle mounts and one Three-Pack mount on Small frame; three standard bottle mounts and one Three-Pack mount on Medium and Large; two Four-Pack mounts on the fork
Includes two Surly Dummy Rail Collars for a stiffer Dummy Rail/frame interface
Includes kickstand plate
26 x 2.5″ maximum tire clearance; no limitation on chainring sizes
Weight Limit: 400 lb combined rider and cargo
Three wide-ranging frame sizes to fit most riders (S,M,L)
Specs
| Frame measurements (mm) | SM | MD | LG |
|---|---|---|---|
| A. Effective Top Tube | 590 | 620 | 645 |
| B. Stand Over | 725 | 773 | 823 |
| C. Reach | 410 | 431 | 447 |
| D. Stack | 571 | 599 | 627 |
| E. Total Seat Tube Length | 406 | 432 | 508 |
| F. Headtube Length | 150 | 180 | 210 |
| G. Headtube Angle | 70 | 70 | 70 |
| H. Seat Tube Angle | 72.5 | 72.5 | 72.5 |
| I. BB Drop | 40 | 40 | 40 |
| J. BB Height | 299 | 299 | 299 |
| K. Chainstay Length | 821 | 821 | 821 |
| L. Fork Length Axle to Crown | 418 | 418 | 418 |
| M. Fork Offset | 43 | 43 | 43 |
| N. Wheelbase | 1469 | 1500 | 1527 |
| Component measurements (mm) | |||
| Crank Arm Length | 165 | 170 | 170 |
| Handlebar Width | 718 | 735 | 735 |
| Stem Length | 70 | 70 | 80 |
* All dimensions are preliminary and subject to change
Frameset
| Component | Specification |
|---|---|
| Frame | Surly Big Dummy, 4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded |
| Fork | Surly Cocktail Fork, 4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, E.D. coated |
| Color | Twilight Zone |
Drivetrain
| Component | Specification |
|---|---|
| Shifter | Shimano CUES U4000 |
| Rear Derailleur | Shimano CUES U4000 GS |
| Front Derailleur | N/A (1x drivetrain) |
| Cassette | Shimano CUES LG300, 11–46T, 9-speed |
| Chain | KMC XGlide EPT Anti-Rust |
| Crankset | Shimano CUES U6000, 32T |
| Bottom Bracket | Shimano MT501, BSA |
Brakes
| Component | Specification |
|---|---|
| Brake Levers | Tektro HD-M3120 |
| Brake Calipers | Tektro HD-M3120, 2-piston hydraulic |
| Rotors | Tektro, 203 mm front / 203 mm rear, 6-bolt |
Components
| Component | Specification |
|---|---|
| Headset | FSA Orbit MX |
| Stem | Kalloy AS007N |
| Handlebar | Surly Terminal Bar |
| Grips | Velo Black |
| Seatpost | Kalloy SP-DC2 |
| Saddle | WTB Rocket Fusion Medium |
Wheels & Tires
| Component | Specification |
|---|---|
| Front Hub | Novatec, QR × 100 mm |
| Rear Hub | Novatec, QR × 135 mm |
| Spokes | DT Swiss Champion |
| Rims | WTB ST Tough i30 TCS 2.0, 26″, 36H |
| Tires | Surly ExtraTerrestrial 26 × 2.5″, 60 TPI, tubeless-ready |
Other
| Component | Specification |
|---|---|
| Pedals | Not included |
| Complete Weight | 45 lb 14 oz (Medium, with rack and bags) |
Note: Specifications are subject to change without notice.
Warranty
Register your purchase at Surly’s Warranty Registration.
LIMITED WARRANTY FOR THEÂ SURLY BIG DUMMY
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.