Specialized Jett 20 Single Speed

Name: Specialized Jett 20 Single Speed
Brand: Specialized

2023 YouthMountain youth Manufacturer page

Specialized Jett 20 Single Speed, color Gloss Oasis / Forest Green

Last known price: $424

Prices shown first for United States
Suspension: Rigid
Wheels: 20″
Drivetrain: 1 × 1 34t / 18t
Gear range: 100%
Frame: Aluminum
Brakes: Rim brake

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

1 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

A1 Premium Butted Alloy, unisex frame, internal cable routing, 110x10mm dropouts Not identified

Suspension

1 part

Fork

A1 Premium Butted Alloy, Alloy steerer, V-Brake Not identified

Drivetrain

4 parts

Bottom bracket

Square taper, Plastic cups, 113mm spindle Not identified
Cassette

18t Freewheel Not identified
Chain
- KMC
Crankset

Forged Alloy, Square Taper, Single Speed, w/ Chainguard, 34T Not identified

Brakes

1 part

Brakes

Front: V-brake w/ tool-less reach adjust brake lever, Rear: V-brake w/ tool-less reach adjust brake lever Not identified

Wheels and tires

5 parts

Front hub

Alloy, Loose Ball Bearings, Bolt type, 100mm Spacing, 28H Not identified
Rear hub

Alloy, Loose Ball Bearings, Bolt type, 110mm Spacing, 28H Not identified
Rims

Alloy, 14mm Depth, 23mm Internal Width, 28H Not identified
Spokes

Stainless, 14g Not identified
Tires

Front: Pathfinder Sport, 20x2.0", Rear: Pathfinder Sport, 20x2.0" Not identified

Cockpit and contact points

6 parts

Grips

Jett Body Geometry, 19mm Internal Diameter, lock-on Not identified
Handlebar

Alloy Mini Rise, Double Butted, 60mm Rise, 5-degree Backsweep, 580mm Width, 25.4mm Clamp Diameter, 19mm Bar End Diameter Not identified
Pedals

Nylon platform w/ reflectors Not identified
Saddle

Kids Bridge Saddle, 130mm Not identified
Seatpost

Alloy, 2-bolt, 14mm offset, 27.2mm Not identified
Stem

3D Forged Aluminum, 35mm length, 6 degree rise, 25.4mm clamp diameter 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 20"

Table

Reach 295mm

Stack 398mm

Wheelbase 828mm

Head angle 69.0°

Seat angle 73.0°

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	295
Stackmm	398
Top tube lengthmm	417
Seat tube lengthmm	290
Head tube lengthmm	100
Head tube angle	69°
Seat tube angle	73°
Chainstay lengthmm	350
Wheelbasemm	828
Front centermm	480
Bottom bracket dropmm	30
Bottom bracket heightmm	229.5
Standover heightmm	510
Fork rakemm	40
Trailmm	57
Stack/reach ratio	1.35

Not published by the manufacturer: 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

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 34
Largest chainring: 34
Rear sprockets: 1
Smallest sprocket: 18
Largest sprocket: 18
Lowest gear: 37.8 in
Highest gear: 37.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: No shifting

Additional specifications

Tire width: 2″
Travel: Front: Additional specification: Not available: Yes
Rear: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 20″

Technical analysis

2 measures

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

Lowest gear

37.8 gear inches

This value is above the central range for this class.

Cohort: Youth / Mountain youth Model year: 2023
Sample: 345 bicycles with this information
Coverage: 81.5% of the class

Highest gear

37.8 gear inches

This value is below the central range for this class.

Cohort: Youth / Mountain youth Model year: 2023
Sample: 345 bicycles with this information
Coverage: 81.5% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 14.5 km/h
Highest gear: 14.5 km/h

Total gear range 100%

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: 37.8–37.8 gear inches
Class reference (p10–p90): 14.0–78.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Youth / Mountain youth Model year: 2023
Lowest gear: 345 bicycles with this information, 81.5% of the class
Highest gear: 345 bicycles with this information, 81.5% 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 2023 builds
Specification	This bicycle Specialized Jett 20 Single Speed	Specialized Jett 16 Single Speed	Specialized Jett 16 Singlespeed	Specialized Jett 20	Specialized Jett 20 Multispeed	Specialized Jett 20 Singlespeed
Drivetrain
Front chainrings	1	1	Not informed	1	2	Not informed
Smallest chainring	34	26	Not informed	34	Not informed	Not informed
Largest chainring	34	26	Not informed	34	Not informed	Not informed
Rear sprockets	1	1	1	7	7	1
Smallest sprocket	18	16	16	11	11	18
Largest sprocket	18	16	16	34	34	18
Lowest gear	37.8 in	26.0 in	Not informed	20.0 in	Not informed	Not informed
Highest gear	37.8 in	26.0 in	Not informed	61.8 in	Not informed	Not informed
Cockpit
Shifting	No shifting	No shifting	Mechanical	Mechanical	Mechanical	Mechanical
Other specifications
Wheel size	20″	16″	16″	20″	20″	20″