Trek Superfly 20

Name: Trek Superfly 20
Brand: Trek

2018 YouthGeneral youth

Last known price: $399

Prices shown first for United States
Suspension: Rigid
Wheels: 20″
Drivetrain: 1 × 6 32t / 14–28t
Gear range: 200%
Weight: 8.16 kg 18.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Rim brake

Sizes

Size guide

facetWheelSize10

The manufacturer did not publish rider heights for these sizes.

Components

10 of 20 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

20˝ Dialed frame size, Alpha Gold Aluminum Not identified

Suspension

1 part

Fork

Dialed 20˝, alloy Not identified

Drivetrain

6 parts

Bottom bracket

Sealed cartridge Not identified
Cassette

SunRun freewheel, 14-28, 6 speed Not identified
Chain
- KMC
Crankset

Alloy, 32T Not identified
Rear derailleur
- Shimano Tourney RD-TY300 7 speeds
RD-TY300
Shifters
- Shimano SL-RS35
SL-RS35

Brakes

1 part

Brakes

Alloy linear-pull, Dialed alloy levers Not identified

Wheels and tires

4 parts

Front hub
- Formula FM-21
FM-21
Rear hub
- Formula
Rims

20˝ 32-hole alloy Not identified
Tires
- Bontrager

Cockpit and contact points

7 parts

Grips

Dialed, Kraton Not identified
Handlebar
- Bontrager
Headset
- VP
Pedals

Dialed 9/16˝, platform Not identified
Saddle

Dialed 20˝ size, padded Not identified
Seatpost
- Bontrager
Stem
- Bontrager

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 facetWheelSize10

Table

Geometry diagram unavailable

The drawing needs chainstay 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	306
Stackmm	427
Top tube lengthmm	445
Seat tube lengthmm	255
Head tube lengthmm	135
Head tube angle	70°
Seat tube angle	72°
Wheelbasemm	864
Bottom bracket dropmm	15
Standover heightmm	518
Trailmm	48
Stack/reach ratio	1.40

Not published by the manufacturer: Chainstay length, Front center, Bottom bracket height, Fork rake, 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: 8.16 kg

18.0 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 6
Smallest sprocket: 14
Largest sprocket: 28
Lowest gear: 22.9 in
Highest gear: 45.7 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 1.85″
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

22.9 gear inches

This value is within the central range for this class.

Cohort: Youth / General youth Model year: 2018
Sample: 137 bicycles with this information
Coverage: 71.3% of the class

Highest gear

45.7 gear inches

This value is within the central range for this class.

Cohort: Youth / General youth Model year: 2018
Sample: 137 bicycles with this information
Coverage: 71.3% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 8.8 km/h
Highest gear: 17.5 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: 22.9–45.7 gear inches
Class reference (p10–p90): 17.9–78.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Youth / General youth Model year: 2018
Lowest gear: 137 bicycles with this information, 71.3% of the class
Highest gear: 137 bicycles with this information, 71.3% 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 2018 builds
Specification	This bicycle Trek Superfly 20	Trek Superfly 24	Trek Superfly 26
Frame
Fork material	Aluminum	Not informed	Not informed
Bicycle weight	8.16 kg	11.56 kg	12.65 kg
Suspension
Suspension configuration	Rigid	Hardtail	Hardtail
Front travel	Not informed	50 mm	90 mm
Drivetrain
Front chainrings	1	3	1
Smallest chainring	32	22	30
Largest chainring	32	42	30
Rear sprockets	6	7	11
Smallest sprocket	14	14	11
Largest sprocket	28	34	42
Lowest gear	22.9 in	15.5 in	18.6 in
Highest gear	45.7 in	72.0 in	70.9 in
Brakes
Brake type	Rim brake	Rim brake	Hydraulic disc
Other specifications
Suspension	Rigid	Hardtail	Hardtail
Tire width	1.85″	1.85″	2.2″
Wheel size	20″	24″	26″
Fork spring	Not informed	Coil	Air