Polygon Xtrada 20

Name: Polygon Xtrada 20
Brand: Polygon

2026 YouthMountain youth Manufacturer page

Last known price: $799

Prices shown first for United States
Fork travel: 60 mm
Wheels: 20″
Drivetrain: 1 × 9 30t / 11–38t
Gear range: 345%
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

3'9" - 4'3"

The manufacturer did not publish rider heights for these sizes.

Components

11 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

ALX Junior alloy, Post Mount, QR/Nut 10 × 135MM rear spacing, tapered 44/56MM head tube, BSA threaded 73MM BB, internal brake and shifter routing, Replaceable dropout Not identified

Suspension

1 part

Fork
- Polygon

Drivetrain

6 parts

Bottom bracket

BSA, 73mm, threaded Not identified
Cassette
- microSHIFT Advent 11–38t
CS-H093
Chain
- KMC X9 9 speeds
Crankset

30T Not identified
Rear derailleur
- microSHIFT ADVENT Super Short Cage Clutch 9 speeds
RD-M6195
Shifters
- microSHIFT ADVENT Quick Trigger Pro Shifter 1×9 9 speeds
SL-M6195

Brakes

2 parts

Wheels and tires

4 parts

Front hub

Alloy, 6-bolt disc, QR 9MM, 100MM, 32H Not identified
Rear hub

Alloy, 6-bolt disc, QR 10MM, 135MM, 32H, 8/9-speed freehub Not identified
Rims

Alloy double wall, 30MM width, 23MM height Not identified
Tires
- WTB

Cockpit and contact points

7 parts

Grips

Standard Not identified
Handlebar
- Polygon
Headset

Zero Stack, caged bearing, ZS 44/28.6 | ZS 56/30 Not identified
Pedals

One-piece PP body Not identified
Saddle

Black, steel rails, 7MM Not identified
Seatpost
- Polygon
Stem
- Polygon

Sizes and geometry

1 size Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size 3'9" - 4'3"

Table

Geometry diagram unavailable

The drawing needs head tube length, which the manufacturer did not publish. Available facts remain in the table.

Size Reach Stack

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	310
Stackmm	500
Top tube lengthmm	445
Seat tube lengthmm	308
Head tube angle	66°
Seat tube angle	75°
Chainstay lengthmm	340
Wheelbasemm	912
Front centermm	572
Bottom bracket dropmm	10
Bottom bracket heightmm	259
Standover heightmm	560
Fork rakemm	40
Stack/reach ratio	1.61
Suspension and parts
Crank lengthmm	127
Handlebar widthmm	580
Stem lengthmm	45

Not published by the manufacturer: Head tube length, Trail, Front travel, Rear travel, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

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

Suspension

Suspension configuration: Hardtail
Front travel: 60 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 9
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: Air
Tire clearance: Maximum tire width: 2.4″
Tire width: 2.25″
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
Specification	This bicycle Polygon Xtrada 20	Polygon Xtrada 24	Polygon Xtrada 5	Polygon Xtrada 6	Polygon Xtrada 7
Frame
Fork material	Aluminum	Aluminum	Not informed	Not informed	Not informed
Suspension
Front travel	60 mm	80 mm	120 mm	120 mm	120 mm
Drivetrain
Smallest chainring	30	30	32	32	32
Largest chainring	30	30	32	32	32
Rear sprockets	9	10	10	12	12
Smallest sprocket	11	11	11	10	10
Largest sprocket	38	48	48	51	52
Lowest gear	15.8 in	18.1 in	19.3 in	18.2 in	17.9 in
Highest gear	54.6 in	79.1 in	84.4 in	92.8 in	92.8 in
Cockpit
Seatpost	Rigid seatpost	Rigid seatpost	Rigid seatpost	Dropper seatpost	Dropper seatpost
Derailleur hanger	Not informed	Not informed	UDH	UDH	UDH
Other specifications
Fork spring	Air	Air	Coil	Not informed	Not informed
Tire clearance	Maximum tire width: 2.4″	Maximum tire width: 2.4″	Maximum tire width: 2.25″	Maximum tire width: 2.25″	Maximum tire width: 2.25″
Wheel size	20″	700c	29″	29″	29″

Changes since 2025
Specification	2025 Polygon Xtrada 20	This bicycle Polygon Xtrada 20
Frame
Fork material	Not informed	Aluminum
Suspension
Front travel	80 mm	60 mm
Drivetrain
Smallest chainring	32	30
Largest chainring	32	30
Lowest gear	16.8 in	15.8 in
Highest gear	58.2 in	54.6 in
Other specifications
Fork spring	Coil	Air
Tire clearance	Not informed	Maximum tire width: 2.4″
Wheel material	Not informed	Aluminum