Surly Big Dummy Frameset
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Surly Big Dummy Frameset
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
| 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 |