GT Siren 20 Girls Bike Lilac (2019)

Now $290.00 RRP $299.00 SAVE $9.00
In stock

Available on orders over $40. Collection in 1-7 days. WA orders 1-14 days. More info »

Free delivery over $99. Some exclusions apply. More info »

Up to 12 months interest free


The GT Siren is a 20 inch kids bike for the up and coming rider. This model is starting to get some similar features to adult bikes, with an alloy frame designed using the LegitFit system which provides better positioning, easier pedaling, and a faster start to your next ride. While you’ll also get a range of durable alloy components, such as stem, seat post and rims. When your kids are flying around and having a great time on their bike, they’ll need to be able to stop at any moment. For this reason it is equipped with coaster brakes, for the perfect amount of braking power for the little ones, so that they can be kept safe and sound. This bike offers reliability, durability and good looks in one package, perfect for a younger rider.


  • Alloy Stem and Seat Post
  • Alloy Rims
  • Steel Bar with Closed End Grips


See More Information tab.

More Information
Model Year2019
Bottom BracketCartridge Sealed
BrakesCoaster rear
Brake LeversTektro 3-Finger, Linear Pull
CassetteSunrace FW, 14-28, 6-Speed
ChainKMC Z410A, 1/2" x 1/8"
CranksetForged One-Piece Type, 127mm, 32T
Derailleur RearShimano Tourney
Popular FiltersGirl's
ForkGT Hi-Ten Steel, 1" Threaded Steerer
Frame20" GT LegitFit Design, Alloy
Grips120mm closed end
HandlebarSteel Riser bar, 176mm rise, 580mm
HeadsetSteel, 1"
HubsSteel, 28 Hole, 3/8" Axle front, Steel, 28 Hole, Coaster rear
PedalsGT BMX Flat Pedal, Resin
RimsAlloy, 28h
SaddleGT 1-piece
Stem2-Bolt Alloy Top, Steel Quill
SpokesStainless Steel, 14g
ShiftersShimano Revo Twist Shifter For Small Hands, SL-RS36, 1x6
TyresGT 20 x 1.95"
Write Your Own Review
Only registered users can write reviews. Please Sign in or create an account

About GT Bicycles

GT'S story is simple: speed, speed and even more speed. From GT’s namesake Gary Turner designing one of the first BMX race bikes in 1972 to the modern carbon fiber creations that redefine fast-as-hell, GT has built a long legacy of racing, winning, yet never taking things too seriously.

View all GT Bikes >

Club 99 Membership

Join Club 99 for just $5 when you make a purchase in store, or use the button below to buy membership online. To reward you for being a club member, your Club 99 membership card will give you these great benefits:

  • Discounted Club 99 pricing, in store and online
  • A $25 gift card when you spend over $500 in a year *
  • Access to free bike maintenance classes
  • Exclusive priority access to new offers
  • Access to exclusive guarantees

Please note that when you buy Club 99 membership online, it may take up to 20 minutes to receive your welcome email.

* Click here for Club 99 terms and conditions.

Kids Bike Sizing Chart

Rider's Height (cm)
12" Wheel
16" Wheel
20" Wheel
24" Wheel
26" Wheel

This is an accurate estimate, and every new bike comes with a free professional bike fit when you click & collect in store, plus all bikes have a 30 day Perfect Ride Guarantee.