FORTH Park 20

Name: FORTH Park 20
Brand: FORTH

2025 YouthMountain youth Manufacturer page

Last known price: $555

Prices shown first for United States
Suspension: Rigid
Wheels: 20″
Drivetrain: 1 × 8 25t / 11–32t
Gear range: 291%
Weight: 9.39 kg 20.7 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Mechanical disc

Sizes

Size guide

One Size

The manufacturer did not publish rider heights for these sizes.

Components

9 of 18 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

6061 Heat Treated Aluminum Not identified

Suspension

1 part

Fork

Aluminum Tig Welded Not identified

Drivetrain

6 parts

Bottom bracket
- Neco
Cassette
- Shimano CS-HG200-8 8 speeds 11–32t
CS-HG200HG-200
Chain
- KMC Z6 6 speeds
Crankset
- Samox 25t
Rear derailleur
- Shimano Tourney TX RD-TX800 8 speeds
RD-TX800
Shifters
- Shimano Altus SL-M315-8R 8 speeds
SL-M315-8R

Brakes

2 parts

Wheels and tires

4 parts

Front hub

Jackl – Alloy, Sealed Bearings, Quick Release Not identified
Rear hub

Jackl – Alloy, Sealed Bearings, Quick Release Not identified
Rims

20” x 1.75, Alloy Not identified
Tires
- Kenda

Cockpit and contact points

4 parts

Grips

115 mm, lock-on Not identified
Pedals

Platform, Composite, 95 x 85 mm, 9/16" thread Not identified
Saddle

Velo-7087 Not identified
Seatpost

27.2 mm Not identified

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 One Size

Table

Reach 296mm

Stack 419mm

Wheelbase 832mm

Head angle 69.0°

Seat angle 71.0°

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 Reach Stack

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Reachmm	296
Stackmm	419
Top tube lengthmm	439
Seat tube lengthmm	275
Head tube lengthmm	100
Head tube angle	69°
Seat tube angle	71°
Chainstay lengthmm	350
Wheelbasemm	832
Front centermm	484
Bottom bracket dropmm	30
Fork rakemm	35
Stack/reach ratio	1.42

Not published by the manufacturer: Bottom bracket height, Standover height, Trail, Front travel, Rear travel, Crank length, 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
Bicycle weight: 9.39 kg

20.7 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 25
Largest chainring: 25
Rear sprockets: 8
Smallest sprocket: 11
Largest sprocket: 32
Lowest gear: 15.6 in
Highest gear: 45.5 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Mechanical disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 2.1″
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

15.6 gear inches

This value is below the central range for this class.

Cohort: Youth / Mountain youth Model year: 2025
Sample: 257 bicycles with this information
Coverage: 70.0% of the class

Highest gear

45.5 gear inches

This value is below the central range for this class.

Cohort: Youth / Mountain youth Model year: 2025
Sample: 257 bicycles with this information
Coverage: 70.0% of the class

Shifting

Mechanical

10 of 367 bicycles with this information use electronic shifting.

Cohort: Youth / Mountain youth Model year: 2025
Sample: 367 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.0 km/h
Highest gear: 17.4 km/h

Total gear range 291%

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: 15.6–45.5 gear inches
Class reference (p10–p90): 14.0–80.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Youth / Mountain youth Model year: 2025
Lowest gear: 257 bicycles with this information, 70.0% of the class
Highest gear: 257 bicycles with this information, 70.0% 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 2025 builds
Specification	This bicycle FORTH Park 20	FORTH Park 14	FORTH Park 16	FORTH Park 24
Frame
Bicycle weight	9.39 kg	7.19 kg	7.69 kg	10.09 kg
Drivetrain
Smallest chainring	25	25	25	28
Largest chainring	25	25	25	28
Rear sprockets	8	1	1	8
Smallest sprocket	11	14	12	11
Largest sprocket	32	14	12	32
Lowest gear	15.6 in	25.0 in	33.3 in	21.0 in
Highest gear	45.5 in	25.0 in	33.3 in	61.1 in
Brakes
Brake type	Mechanical disc	Rim brake	Rim brake	Mechanical disc
Cockpit
Shifting	Mechanical	No shifting	No shifting	Mechanical
Other specifications
Tire width	2.1″	Not informed	Not informed	2.1″
Wheel size	20″	14″	16″	24″