Siren 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 tyres, 2pc bars and even a numberplate FTW.


Was $300.00


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frame 20" GT LegitFit Design, Alloy
sizes available O/S
fork GT Hi-Ten Steel, 1" Threaded Steerer
wheel size 20"


rims Alloy, 28h
front hub Steel, nutted axle
rear hub Steel, Nutted Axle, Coaster Brake
front tire GT 20 x 1.95"
rear tire GT 20 x 1.95"


chain KMC S1, 1/2x1/8"
crank Forged One-Piece Type, 127mm, 32T
bottom bracket Steel, Ball Type
pedals Jr. BMX Design, Resin


handlebar Steel Riser Bar, 176mm Rise, 580mm Width
stem 2-Bolt Alloy Top, Steel Quill
grips 120mm Closed End
headset 1" Threaded, Steel
saddle GT 1-piece


brakes Coaster Rear, Rear Alloy VBrake
brake levers Alloy V-type

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"

GT Tech Book

GT Owner's Manual