Giant ARX 20

Name: Giant ARX 20
Brand: Giant

2025 YouthGeneral youth Manufacturer page

Price: Not published

Prices shown first for United States
Europe: €449 Last known price
Suspension: Rigid
Wheels: 20″
Drivetrain: 1 × 8 32t / 12–32t
Gear range: 267%
Frame: Aluminum
Brakes: Rim brake

Rider height by size (cm)

Size guide

One Size 120–140

Components

9 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 aluminium Not identified

Suspension

2 parts

Fork

ALUXX-grade aluminium Not identified
Rear shock

None

Drivetrain

7 parts

Bottom bracket

sealed cartridge Not identified
Cassette
- Shimano CS-HG200
CS-HG200
Chain
- KMC
Crankset

alloy, forged, three-piece, 32t, 115mm Not identified
Front derailleur

None
Rear derailleur
- Shimano Altus RD-M310
RD-M310
Shifters
- Shimano Altus SL-M315
SL-M315

Brakes

2 parts

Brake levers

alloy, junior MTB Not identified
Brakes

alloy, linear pull Not identified

Wheels and tires

5 parts

Front hub

Alloy, 24 hole, quick release axles Not identified
Rear hub

Alloy, 24 hole, quick release axles Not identified
Rims
- Giant
Spokes

stainless, 14g Not identified
Tires
- Innova
IB-3010

Cockpit and contact points

6 parts

Grips
- Giant
Handlebar
- Giant
Pedals

platform Not identified
Saddle
- Selle Royal Vivo
Seatpost

alloy, 27.2mm Not identified
Stem

Ahead, alloy, 25.4x60mm Not identified

Sizes and geometry

1 size Open in the geometry plotter

Enter your height to highlight matching ranges.

Size One Size

Table

Geometry diagram unavailable

The drawing needs seat tube length and bottom bracket drop / Bottom bracket height, which the manufacturer did not publish. Available facts remain in the table.

Size Reported by the manufacturer

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	319
Stackmm	403
Top tube lengthmm	450
Head tube lengthmm	120
Head tube angle	69°
Seat tube angle	72°
Chainstay lengthmm	375
Wheelbasemm	886
Standover heightmm	509
Stack/reach ratio	1.26
Suspension and parts
Crank lengthmm	127

Not published by the manufacturer: Seat tube length, Front center, Bottom bracket drop, Bottom bracket height, Fork rake, Trail, Front travel, Rear travel, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Aluminum

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 8
Smallest sprocket: 12
Largest sprocket: 32
Lowest gear: 20.0 in
Highest gear: 53.3 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 1.5″
Travel: Rear: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 20″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.7 km/h
Highest gear: 20.4 km/h

Total gear range 267%

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: 20.0–53.3 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 2025 builds

Differences across 2025 builds
Specification	This bicycle Giant ARX 20	Giant ARX 24	Giant ARX 26
Drivetrain
Smallest sprocket	12	12	11
Largest sprocket	32	32	34
Lowest gear	20.0 in	24.0 in	24.5 in
Highest gear	53.3 in	64.0 in	75.6 in
Other specifications
Wheel size	20″	24″	26″