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Surly Big Dummy

Surly Big Dummy
This item is currently not available.


The Surly Big Dummy. Designed to transport a rider and up to 200 pounds of cargo, the Big Dummy retains an extremely smooth and maneuverable ride under the heaviest of burdens. Big Dummy bikes ship with a Dummy deck, rails, Dummy Rail Collars, bags, and kickstand.

- 100% Surly chromoly steel; fork is suspension corrected for 80mm
- Fender eyelets and Surly Trip Guides for continuous brake/shift housing or brake hydraulic lines
- Two standard bottle mounts and one 3-pack mount on Small frame; three standard bottle mounts and one 3-pack mount on Medium and Large; four 3-pack mounts on the fork
- Includes (2) Surly Dummy Rail Collars for a stiffer Dummy Rail/Frame interface
- Length of the frame requires 2 chains and tandem cables
- 26 x 2.5" maximum tire clearance; absolutely no limitation on chainring sizes
- Weight Limit: 400 lbs. combined rider & cargo

Geometry Chart:
Rider Height (mm) 1600–1778 1676–1829 1778–1956
Reach 409.9 431.1 447.2
Stack 571.1 599.3 627.4
Head Tube Angle 70.0° 70.0° 70.0°
Head Tube Length 150 180 210
Seat Tube Length 406 432 508
BB Drop 40 40 40
Wheelbase 1469 1500.4 1526.8
Chainstay Length 821 821 821
Top Tube Length, Effective 590 620 645
Seat Tube Angle 72.5° 72.5° 72.5°
Standover Height 725 773 823
BB Height 299 299 299
Stem Length 70 70 80
Stem Angle
Handlebar Width 718 735 735
Crank Length 170 175 175
Fork Length 417.8 417.8 417.8
Fork Rake 43 43 43

WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to


Frame Steel
Fork Steel, Rigid
Rims OE, 38mm, 36h
Hubs Front: Novatec QR x 100, 36h
Rear: Novatec QR x 135, 36h
Spokes DT Swiss 2.0 Stainless
Axles Front: QR x 100mm
Rear: QR x 135mm
Tires Surly ExtraTerrestrial Tire - 26 x 2.5, Tubeless, Folding, Black/Slate, 60tpi
Bottom Bracket Race Face BSA 24
Crankset Race Face Ride Crankset, 32t
Shifters microSHIFT Advent Trail 1x9 shifter, SL-M9195-R
Rear Derailleur microSHIFT Advent 1 x 9 Speed, RD-M6195M
Cassette/Freewheel microSHIFT Advent 9 Speed 11-46t, CS-H093
Chain KMC X10 10 Speed
Brakes Avid BB7 S MTN
Rotors SRAM Centerline 200/180mm
Brake Levers Avid FR-5
Handlebars Surly Terminal Bar
Tape/Grips Velo Black
Stem Kalloy 31.8
Headset Cane Creek 40 Series, EC34
Seatpost Kalloy 27.2x350
Saddle Selle Italia X-Base
Pedals Sold separately

* Subject to change without notice.