Giant STP 20 FS

Name: Giant STP 20 FS
Brand: Giant

2026 YouthMountain youth Manufacturer page

Last known price: $790

Prices shown first for United States
Fork travel: 63 mm
Wheels: 20″
Drivetrain: 1 × 8 30t / 11–38t
Gear range: 345%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

One Size 110–130

Components

13 of 21 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

ALUXX-grade aluminum, 12x142mm thru-axle Not identified

Suspension

2 parts

Fork

SR XCT Jr. L20, coil spring, 9x100mm QR, 63mm travel Not identified
Rear shock

None

Drivetrain

7 parts

Bottom bracket

threaded cartridge Not identified
Cassette
- Shimano
CS-H083
Chain
- KMC X9 9 speeds
Crankset

alloy forged, 30t, 140mm Not identified
Front derailleur

None
Rear derailleur
- microSHIFT Advent
Shifters
- microSHIFT Advent

Brakes

2 parts

Brake levers
- Tektro HD-J2820
HD-J2820
Brakes
- Tektro HD-J2820
HD-J2820

Wheels and tires

5 parts

Front hub
- Giant
Rear hub
- Giant
Rims
- Giant
Spokes

stainless, 14g Not identified
Tires
- Kenda Amrak

Cockpit and contact points

6 parts

Grips
- Giant
Handlebar
- Giant
Pedals

platform Not identified
Saddle
- Giant
Seatpost

alloy, two-bolt, 30.9x260mm Not identified
Stem

forged alloy, 0-degree Not identified

Sizes and geometry

1 size Open in the geometry plotter

Enter your height to highlight matching ranges.

Size One Size

Table

Reach 301mm

Stack 447mm

Wheelbase 821mm

Head angle 67.0°

Seat angle 73.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 20″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	301
Stackmm	447
Top tube lengthmm	444
Seat tube lengthmm	265
Head tube lengthmm	90
Head tube angle	67°
Seat tube angle	73°
Chainstay lengthmm	323
Wheelbasemm	821
Front centermm	504
Bottom bracket dropmm	50
Standover heightmm	536
Fork rakemm	40
Trailmm	91
Stack/reach ratio	1.49
Suspension and parts
Crank lengthmm	105
Handlebar widthmm	600
Stem lengthmm	40

Not published by the manufacturer: Bottom bracket height, Front travel, Rear travel, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum

Suspension

Suspension configuration: Hardtail
Front travel: 63 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 8
Smallest sprocket: 11
Largest sprocket: 38
Lowest gear: 15.8 in
Highest gear: 54.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Fork spring: Coil
Tire width: 2.2″
Wheel material: Aluminum
Wheel size: 20″

Technical analysis

1 measure

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Shifting

Mechanical

9 of 321 bicycles with this information use electronic shifting.

Cohort: Youth / Mountain youth Model year: 2026
Sample: 321 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.0 km/h
Highest gear: 20.9 km/h

Total gear range 345%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 15.8–54.6 gear inches

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2026 builds

Differences across 2026 builds
Specification	This bicycle Giant STP 20 FS	Giant STP 24	Giant STP 26
Suspension
Front travel	63 mm	100 mm	100 mm
Drivetrain
Rear sprockets	8	9	1
Smallest sprocket	11	11	13
Largest sprocket	38	38	13
Lowest gear	15.8 in	19.0 in	60.0 in
Highest gear	54.6 in	65.5 in	60.0 in
Cockpit
Seatpost	Rigid seatpost	Dropper seatpost	Rigid seatpost
Shifting	Mechanical	Mechanical	No shifting
Other specifications
Fork spring	Coil	Not informed	Air
Tire width	2.2″	2.2″	2.25″
Wheel size	20″	24″	26″