GT Bicycles Siren 20" Kids Single Speed Bike - Gloss Pitch Green

Regular price $389.95 Sale price $312.00
Save $77.95
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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.

  • Improved Geometry bikes with the LegitFit system feature geometry adjustments to improve ergonomics for youth statures. The result: Increased stability, comfort and confidence for a wider range of riders.
  • Easier Pedaling bikes with the LegitFit system have their pedal positions moved slightly forward. The result: Makes it easier to pedal. 
  • Better Positioning bikes with the LegitFit system have narrower crank and pedal positions that match the width of a child’s hips. The result: A stronger, more natural pedal stroke.

SIZES    One Size


FRAME    20" GT LegitFit Design, Alloy

FORK    GT Hi-Ten Steel, 1" Threaded Steerer

CHAIN    KMC S1, 1/2x1/8"

CRANK    Forged One-Piece Type, 127mm, 32T

BOTTOM BRACKET    Steel, Ball Type

PEDALS    Jr. BMX Design, Resin

COG SET    Null

RIMS    Alloy, 28h

TIRES    GT 20 x 1.95"

FRONT HUB    Steel, nutted axle

REAR HUB    Steel, Nutted Axle, Coaster Brake

SPOKES    Stainless Steel, 14g

BRAKES    Coaster Rear, Rear Alloy VBrake

FRONT BRAKE    Coaster Rear, Rear Alloy VBrake

REAR BRAKE    Coaster Rear, Rear Alloy VBrake

BRAKE LEVERS    Alloy V-type

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

SPEC EXTRAS    Fender, Bar, Stem Pad

Why choose us?

Mackay Cycles

Locally owned and operated family business

Our passion inspires the pursuit of freedom.  Absorb yourself in the ultimate cycling destination 



The Team helped me out when no other bike shop in Mackay would give me any time. Quick, efficient, great knowledge and ease to talk to. I wouldn't and won’t shop anywhere else.


Great service very nice people with lots of knowledge very helpful with our chosen cycles myself and wife would greatly recommend this shop to anyone starting off on their riding choices 🤓👍

Mackay QLD


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