Fuji Dynamite 20

Name: Fuji Dynamite 20
Brand: Fuji

2025 YouthMountain youth Manufacturer page

Last known price: $399

Prices shown first for United States
Fork travel: 40 mm
Wheels: 20″
Drivetrain: 1 × 6 36t / 14–28t
Gear range: 200%
Weight: 11.79 kg 26.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Rim brake

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

13 of 19 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

A1-SL alloy front and rear triangle Not identified

Suspension

1 part

Fork
- Zoom
CH-386E

Drivetrain

7 parts

Bottom bracket

Water-sealed, Loose ball Not identified
Cassette
- Shimano 14–28t
Chain
- KMC
Crankset
- Fuji 36t
Front derailleur

None
Rear derailleur
- Shimano Tourney
Shifters
- Shimano Tourney

Brakes

2 parts

Brake levers
- Magura 2-finger
Brakes

Alloy, linear pull Not identified

Wheels and tires

2 parts

Cockpit and contact points

7 parts

Grips

Single-density Kraton Not identified
Handlebar
- Fuji
Headset

1 1/8" sealed bearings Not identified
Pedals

Resin platform Not identified
Saddle
- Selle Royal On
Seatpost
- Fuji
Stem
- Fuji

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 10"

Table

Geometry diagram unavailable

The drawing needs seat 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
Reachmm	310.8
Stackmm	391.3
Top tube lengthmm	460
Head tube lengthmm	120
Head tube angle	70°
Seat tube angle	72°
Chainstay lengthmm	385
Wheelbasemm	863.7
Front centermm	482
Bottom bracket dropmm	35
Standover heightmm	589.7
Fork rakemm	15
Stack/reach ratio	1.26

Not published by the manufacturer: Seat tube length, Bottom bracket 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
Bicycle weight: 11.79 kg

26.0 lb

Suspension

Suspension configuration: Hardtail
Front travel: 40 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 36
Largest chainring: 36
Rear sprockets: 6
Smallest sprocket: 14
Largest sprocket: 28
Lowest gear: 25.7 in
Highest gear: 51.4 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

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

25.7 gear inches

This value is above 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

51.4 gear inches

This value is within 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: 9.8 km/h
Highest gear: 19.7 km/h

Total gear range 200%

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: 25.7–51.4 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 Fuji Dynamite 20	Fuji Dynamite 16 Coaster	Fuji Dynamite 20 Coaster	Fuji Dynamite 20+	Fuji Dynamite 24	Fuji Dynamite 24 Comp
Frame
Bicycle weight	11.79 kg	9.36 kg	9.81 kg	10.62 kg	11.7 kg	12.36 kg
Fork material	Not informed	Steel	Steel	Aluminum	Steel	Not informed
Suspension
Suspension configuration	Hardtail	Rigid	Rigid	Rigid	Rigid	Hardtail
Front travel	40 mm	Not informed	Not informed	Not informed	Not informed	50 mm
Drivetrain
Smallest chainring	36	26	32	28	32	36
Largest chainring	36	26	32	28	32	36
Rear sprockets	6	Not informed	Not informed	8	7	8
Smallest sprocket	14	Not informed	Not informed	11	14	11
Largest sprocket	28	Not informed	Not informed	34	34	32
Lowest gear	25.7 in	Not informed	Not informed	16.5 in	22.6 in	27.0 in
Highest gear	51.4 in	Not informed	Not informed	50.9 in	54.9 in	78.6 in
Brakes
Brake type	Rim brake	Coaster brake	Coaster brake	Mechanical disc	Rim brake	Rim brake
Other specifications
Suspension	Hardtail	Rigid	Rigid	Rigid	Rigid	Hardtail
Tire width	2.1″	2.125″	2.125″	2.6″	2.125″	1.95″
Wheel size	20″	16″	20″	20″	24″	24″

Changes since 2024
Specification	2024 Fuji Dynamite 20	This bicycle Fuji Dynamite 20
Frame
Fork material	Steel	Not informed
Bicycle weight	10.7 kg	11.79 kg
Suspension
Suspension configuration	Rigid	Hardtail
Front travel	Not informed	40 mm
Drivetrain
Smallest chainring	32	36
Largest chainring	32	36
Rear sprockets	7	6
Largest sprocket	34	28
Lowest gear	18.8 in	25.7 in
Highest gear	45.7 in	51.4 in
Other specifications
Suspension	Rigid	Hardtail
Tire width	2.125″	2.1″