2018 GT

Grunge Boy's 12"

A 12″ steel frame general youth bike.
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MSRP$159
FrameSteel
SuspensionRigid
ForkSteel
Wheels12″ Aluminum
DrivetrainSingle-speed
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Insights
Gearing

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 Boy's 12"

18 mph

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Highest gear

(descending)

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Specs
Build
Frame

12" GT LegitFit Design, Hi-Ten Steel

Fork

GT Hi-Ten Steel, 1" Threaded Steerer

Bottom Bracket

Steel, Ball type

Headset

Steel, 1"

Stem

2-Bolt Alloy Top, Steel Quill

Handlebar

Steel 480mm width x 130mm rise

Saddle

GT 1-piece

Seatpost

Alloy

Type: Rigid

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

(F) N/A, (R) Coaster

Wheels
Rims

Alloy, 16 hole

Front Hub

(F) Steel, 16 Hole, 3/8" Axle, (R) Steel, 16 Hole,Coaster

Tires

GT 12 x 2.25" (F/R)

Rider Notes
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Last updated July 20
Not listed for 2,093 days