Surly Big Dummy frameset 26' black

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  • Big Dummy is a long-tail cargo bike that expands what's possible by bike.

    Take Your Longtail Bike Anywhere

    Frameset only!

    Since its introduction in 2008, many a family have ditched one or both of their cars thanks to Big Dummy. Weve 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. Its all those things and more in that theres 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


    Frameset
    • Frame: Surly Big Dummy, Surly 4130 Chromoly steel.
    • Fork: Surly Troll, TIG-welded 4130 Chromoly
    • Seatpost Clamp: Surly Stainless, 30mm Surly stainless, included


    Geometry




    S - Small (16)
    M - Medium (18)
    L - Large (20)
    XL - Extra Large (22)
    Reach 399.6 418.1 431.7 444.1
    Stack 566.5 580.0 594.1 611.3
    Head Tube Angle 72.0 72.0 72.0 72.0
    Head Tube Length 131.7 145.9 160.8 178.8
    Seat Tube Length 406.4 457.2 508.0 558.8
    BB Drop 40.0 40.0 40.0 40.0
    Wheelbase 1435.9 1458.8 1477.0 1495.0
    Chainstay Length 827.0 827.0 827.0 827.0
    Top Tube Length, Actual 550.6 570.1 588.7 609.6
    Top Tube Length, Effective 573.5 596.1 614.1 631.8
    Seat Tube Angle 73.0 73.0 73.0 73.0
    Standover Height 740.4 771.5 802.9 835.8
    Fork Length 420 420 420 420
    Fork Rake 43.0 43.0 43.0 43.0
    All dimensions are preliminary and subject to change * Standover is measured from the top of the TT, at the center, with a tire measuring approximately 676mm

    Specifications
    • 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) or Rim - Canti (removable posts)
    • Front Brake: Disc 51mm I.S. (203mm max rotor) or Rim - Canti (removable posts)
    • Head Tube: 34mm
    • Steerer Tube: 28.6mm (1-1/8")
    • Crown Race: 30mm (1-1/8")
    • Headset Upper (S.H.I.S.): EC34/28.6
    • Headset Lower (S.H.I.S.): EC34/30
    • Seat Collar: 30mm
    • Seatpost: 27.2mm
    • Max Chainring (CL)*: No frame limitations
    • Bottom Bracket: 68mm threaded (1.37" x 24TPI)
    • 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
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