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2024 Giant

STP 20

A 20″ aluminum frame mountain youth bike with mid-range components and mechanical disc brakes.
Compare the full range

Manufacturer Price

$580
Weight22.0 lbs  
FrameAluminum
SuspensionRigid
ForkAluminum
Wheels20″ Aluminum
Drivetrain1 × 7
GroupsetTourney
BrakesMechanical Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Handling
nimblestable
STP 20
Other Mountain Youth bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

15 mph

STP 20

Highest gear

(descending)

Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

Compare the full STP model range

View Comparison
Sizing
One Size

3'9" – 4'4"

Rider Fit Notes

None yet.

Do you have this bike? Help other riders make a decision about which size will work for them by sharing your own size and fit notes.

Reviews
Pinkbike
Giant & Liv Launch 20, 24 and 26" STP Bikes

Nov 2025 · Matt Beer

Giant and Liv have a bike for mini-shredders, groms, and parents alike to jam out at the pumptrack.

Read Review

Revolution Mountain Bike Magazine
[R]eviewed // Giant STP 20 is The Perfect kids MTB

May 2023 · May 2, 2023

It wasn’t that long ago that ‘kids’ mountain bikes were really limited and basic, but not any more... Take a look at the ‘Giant STP 20’ which boasts a high quality fully alloy frame along with a well thought out component spec which including a set of suspension forks, 20” wheels, a 7-speed drivetrain and hydraulic disc brakes. And, this impressive package retails in Australia for $749 which we think represents extremely good value for money. In our opinion this [...]

Read Review

Geometry
Specs
Build
Frame

ALUXX-grade aluminum

ColorSandstorm

Fork

alloy, rigid

Shock

N/A

Bottom Bracket

cartridge

Stem

forged alloy, 0-degree

Handlebar

Giant Sport, alloy, 31.8mm

Saddle

Giant Jr. Sport

Seatpost

alloy, 27.2x250mm

TypeRigid

Pedals

platform

Grips

Giant Junior

Groupset
Rear Derailleur

Shimano Tourney

Front Derailleur

N/A

Crank

alloy forged, 30t, 127mm

Shifters

microSHIFT DS45-7

Cassette

Shimano CS-HG200, 12x32

Chain

KMC Z7

Brakes

mechanical disc [F]160mm, [R]160mm rotors

TypeMechanical Disc

Brake Levers

alloy, junior

Wheels
Rims

Giant 20", alloy, 28mm inner width

Spokes

stainless, 14g

Front Hub

Giant Disc, 28h, QR, alloy, disc

Rear Hub

Giant Disc, 28h, QR, alloy, disc

Tires

Kenda Karma, 20x2.6"

Rider Notes
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First added May 4

Last updated February 28

Not listed for 90 days