Bike Comparison
    Grunge 12"2020 GT
    Recommended
    MSRP
    ($216)
    Where to Buy
    —
    $1

    At

    Category
    		General Youth
    Frame
    		Steel
    Fork
    		Steel
    Wheels
    		Aluminum
    Wheel Size
    		12″
    Brakes
    		Coaster
    Motor
    Battery
    Groupset
    Drivetrain
    		Single-speed
    Brand Site

    gtbicycles.com

    Summary
    		The GT Grunge 12" is a 12″ steel frame general youth bike with coaster brakes.
    Similar Bikes
    Accessories
    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)

    5 mph

    Grunge 12"

    Highest gear

    (descending)

    Geometry
    Specs
    Grunge 12"2020 GT
    Frame

    12" GT LegitFit Design, Hi-Ten Steel

    Fork

    GT Hi-Ten Steel, 1" threaded steerer

    Bottom Bracket

    Steel, Ball type

    Headset

    Steel, 1" threaded

    Stem

    2-Bolt alloy top, steel quill

    Handlebar

    Steel Riser bar, 130mm rise, 480mm width

    Saddle

    GT 1-piece

    Seatpost

    Alloy

    Pedals

    Jr. BMX design, resin

    Grips

    95mm closed end

    Groupset
    Crank

    Forged One-Piece Type, 89mm, steel, 24T

    Cassette

    16T Coaster

    Chain

    KMC HV410 1/2" x 1/8"

    Brakes

    Coaster rear

    Wheels
    Rims

    Alloy, 16h

    Spokes

    Stainless Steel, 14g

    Front Hub

    Steel, Nutted axle

    Rear Hub

    Steel, nutted axle, coaster brake

    Tires

    GT 12 x 2.25"GT 12 x 2.25" GT 12 x 2.25"

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