Grunge 20
Even our kids’ bikes are built right from the ground up – perfectly proportioned lightweight alloy frame, easy-riding low-slung design, and handling that makes every ride a breeze. Durable 1pc cranks, all-terrain tires, 2pc bars and even a numberplate FTW.
Frame
fork
GT Hi-Ten Steel, 1" Threaded Steerer
Wheels
front tire
GT 20 x 1.95"
rear tire
GT 20 x 1.95"
Drivetrain
rear cogs
16T Coaster
chain
KMC S1, 1/2x1/8"
crank
Forged One-Piece Type, 127mm, 32T
pedals
Jr. BMX Design, Resin
Cockpit
headset
1" Threaded, Steel
seatpost
Alloy
saddle
GT 1-piece
Fit Guide
- 12" Wheels
-
2'10" - 3'4"
- 16" Wheels
-
3'4" - 4'0"
- 20" Wheels
-
4'0" - 4'5"
- 24" wheels
-
4'3" - 4'8"
- 26" wheels
-
4'3" - 4'8"
Sidewalk Bikes
Kids have their own riding style, and it’s one that changes over time. Each model in our balance bike range has the same quality and durability you’ve come to expect with GT’s full-size rides. And by utilizing GT’s Legit Fit system across the range, these bikes are designed specifically for those growing shredders.
