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    Big Fat Dummy2020 Surly
    Recommended
    MSRP
    $3,175
    Where to Buy
    —
    $1

    At

    Category
    		Long Tail Cargo
    5.8
    Frame
    		Steel
    		Steel
    Wheels
    		Aluminum
    Wheel Size
    		26″ / 29″
    		SRAM Level T Hydraulic Disc
    		GX
    Drivetrain
    		2 × 11
    Brand Site
    Summary
    		The Surly Big Fat Dummy is a 26″ / 29″ steel frame long tail cargo bike with upper mid-range components and sram level t hydraulic disc brakes.

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    Insights
    Gear Range

    A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

    Lowest gear

    (climbing)

    27 mph

    Big Fat Dummy

    Highest gear

    (descending)

    Spec Level

    Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

    Geometry
    Specs
    Big Fat Dummy2020 Surly
    Frame

    Surly 4130 Chromoly steel. Surly 4130 Chromoly steel. Main triangle double-butted. TIG-welded cargo specific engineered for stiffness and durability

    Tire Clearance: 3"

    Fork

    Surly Wednesday, Tapered straight blade 4130 Chromoly. Surly Wednesday, Tapered straight blade 4130 Chromoly. 468mm axle to crown, 47mm offset. 51mm I.S. front standard disc mount, 150mm x 15mm thru-axle dropouts (axle included), 100mm suspension fork compatible

    Bottom Bracket

    Race Face

    Headset

    Cane Creek 40 series

    Stem

    31.8mm clamp 4-bolt

    Handlebar

    Salsa Rustler

    Saddle

    WTB Volt

    Seatpost

    30.9 2-Bolt 400mm

    Type: Rigid

    Grips

    Velo Single lock-on

    Groupset
    Rear Derailleur

    SRAM GX 2x11 type 2.1

    Front Derailleur

    SRAM GX 2x11 high direct mount

    Crank

    Race Face AEffect 34/24T

    Shifters

    SRAM GX 2x11

    Cassette

    Sunrace 11 speed 11-42t

    Chain

    KMX X11 anti rust

    Brakes

    SRAM Level T

    Type: SRAM Level T Hydraulic Disc

    Brake Levers

    SRAM Level T

    Wheels
    Rims

    WTB Scraper i40 ST TCS

    Front Hub

    Novatec, 32h, Thru-Axle

    Rear Hub

    Novatec, 32h, Thru-Axle

    Tires

    Surly Dirt Wizard 29x3 60tpi

    Disc Rotors

    SRAM Centerline 180/180mm

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