Polygon Xtrada 20

Name: Polygon Xtrada 20
Brand: Polygon

2024 YouthMountain youth Manufacturer page

Last known price: $799

Prices shown first for United States
Fork travel: 80 mm
Wheels: 20″
Drivetrain: 1 × 9 32t / 11–38t
Gear range: 345%
Weight: 12.9 kg 28.4 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

3'9" - 4'3"

The manufacturer did not publish rider heights for these sizes.

Components

12 of 16 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 20” Aluminium Frame, Quick Release 10x135mm, Threaded 68mm BB Not identified

Suspension

1 part

Fork
- SR Suntour

Drivetrain

6 parts

Bottom bracket

BSA, 68mm, threaded Not identified
Cassette
- microSHIFT ADVENT H-Series 9 Speed Cassette 11-38 9 speeds 11–38t
CS-H093
Chain
- KMC X9 9 speeds
Crankset
- Prowheel 32t
Rear derailleur
- microSHIFT Advent
RD-M6195
Shifters
- microSHIFT ADVENT Quick Trigger Pro Shifter 1×9 9 speeds
SL-M6195R

Brakes

1 part

Brakes
- Tektro HD-J285
HD-J285

Wheels and tires

2 parts

Rims
- Polygon
DC-20DC-1422
Tires

VeetireCo. Crown Gem, 20x2.25” Not identified

Cockpit and contact points

5 parts

Handlebar
- Polygon
Pedals

Included Not identified
Saddle
- Entity
Seatpost
- Entity
Stem
- Entity

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
Bicycle weight: 12.9 kg

28.4 lb

Suspension

Suspension configuration: Hardtail
Front travel: 80 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 9
Smallest sprocket: 11
Largest sprocket: 38
Lowest gear: 16.8 in
Highest gear: 58.2 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: 2.25″
Wheel material: Aluminum
Wheel size: 20″

Technical analysis

3 measures

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

Lowest gear

16.8 gear inches

This value is within the central range for this class.

Cohort: Youth / Mountain youth Model year: 2024
Sample: 301 bicycles with this information
Coverage: 79.4% of the class

Highest gear

58.2 gear inches

This value is within the central range for this class.

Cohort: Youth / Mountain youth Model year: 2024
Sample: 301 bicycles with this information
Coverage: 79.4% of the class

Shifting

Mechanical

14 of 379 bicycles with this information use electronic shifting.

Cohort: Youth / Mountain youth Model year: 2024
Sample: 379 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.5 km/h
Highest gear: 22.3 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: 16.8–58.2 gear inches
Class reference (p10–p90): 14.1–78.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Youth / Mountain youth Model year: 2024
Lowest gear: 301 bicycles with this information, 79.4% of the class
Highest gear: 301 bicycles with this information, 79.4% of the class

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 2024 builds

Differences across 2024 builds
Specification	This bicycle Polygon Xtrada 20	Polygon Xtrada 24	Polygon Xtrada 5	Polygon Xtrada 5 2x10	Polygon Xtrada 5 Hardtail	Polygon Xtrada 6 1x11
Frame
Bicycle weight	12.9 kg	12.4 kg	Not informed	14.3 kg	14.29 kg	13.88 kg
Suspension
Front travel	80 mm	80 mm	120 mm	120 mm	120 mm	120 mm
Drivetrain
Front chainrings	1	1	2	2	2	1
Smallest chainring	32	30	22	22	22	32
Largest chainring	32	30	36	36	36	32
Rear sprockets	9	10	10	10	10	11
Largest sprocket	38	42	42	42	42	51
Lowest gear	16.8 in	20.7 in	15.2 in	15.2 in	15.2 in	18.2 in
Highest gear	58.2 in	79.1 in	94.9 in	94.9 in	94.9 in	84.4 in
Brakes
Brake type	Hydraulic disc	Mechanical disc	Hydraulic disc	Hydraulic disc	Hydraulic disc	Hydraulic disc
Other specifications
Bottom bracket standard	BSA	Not informed	BSA	BSA	BSA	BSA
Fork spring	Coil	Air	Coil	Coil	Coil	Not informed
Wheel size	20″	700c	27.5″ / 29″	27.5″ / 29″	27.5″ / 29″	27.5″
Tire clearance	Not informed	Not informed	Maximum tire width: 2.25″	Not informed	Not informed	Not informed