Steel, 20 Hole (F) 3/8" Axle, (R) Coaster

Legit Fit System
Better Bike Design. Better Experience.
Learning to ride a bike is memorable, but it isn’t always easy. Kids have to focus on balance, pedaling, and speed… all while trying not to tumble. Up until now kids’ bikes have basically been grown up bikes miniaturized for smaller bodies. Designing bikes this way means proper body positioning and pedaling mechanics are compromised.
Not anymore.
GT has developed a new line of kids' bikes that utilize its Legit Fit system and are designed specifically for those growing shredders. The Legit Fit system enables GT to build kids' bikes that have narrower cranks, proper gearing and improved body positioning. All with the benefits of optimizing pedaling, balance, and speed right from the start. Even better is that it's a system that works for kids of all ages...no more needing to "grow into" a bike.
+ GT Legit Fit System: Better Positioning, Faster Starting and Easier Pedaling
+ GT Designed Alloy Frame
+ Rear Coaster Brake

GT Grunge 20

A 20″ aluminum frame general youth bike with coaster brakes.

Frame	Aluminum
Suspension	Rigid
Fork	Steel
Wheels	20″ Aluminum
Drivetrain	Single-speed
Brakes	Coaster

Frame	16" GT Legit Fit Design, Alloy
Fork	GT Hi-Ten Steel, 1" Threaded Steerer
Bottom Bracket	Steel, Ball type
Headset	Steel, 1"
Stem	2-Bolt Alloy Top, Steel Quill, 30mm
Handlebar	Steel 500mm width x 130mm rise
Saddle	GT 1-piece
Seatpost	Alloy Type: Rigid
Pedals	Jr. BMX design, resin
Grips	92mm closed end

Crank	Forged One-Piece Type, 89mm, Steel, 28T
Cassette	16T Coaster
Chain	1/2" x 1/8"
Brakes	(R) Coaster Type: Coaster

Rims	Alloy, 20 hole
Front Hub	Steel, 20 Hole (F) 3/8" Axle, (R) Coaster
Rear Hub	Steel, 20 Hole (F) 3/8" Axle, (R) Coaster
Tires	16 x 1.95"

2017 GTGrunge 20

2017 GT
Grunge 20