Megamo Open Junior

Name: Megamo Open Junior
Brand: Megamo

2021 YouthMountain youth Manufacturer page

Fork travel: 80 mm
Wheels: 24″
Drivetrain: 3 × 7 22–42t / 14–28t
Gear range: 382%
Frame: Aluminum
Brakes: Rim brake

Sizes

Size guide

One Size

The manufacturer did not publish rider heights for these sizes.

Components

4 of 9 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

ALLOY 6061 HYDROFORMED Not identified

Suspension

1 part

Fork

ALLOY 386 80mm Not identified

Drivetrain

4 parts

Cassette
- Shimano MF-TZ21 14–28t
MF-TZ21
Crankset
- Megamo 22t
Rear derailleur
- Shimano Tourney RD-TX35
RD-TX35
Shifters
- Shimano ST-EF41
ST-EF41

Brakes

1 part

Brakes

Rim Not identified

Wheels and tires

2 parts

Rims

ALLOY SCOUT BLACK Not identified
Tires

24” x 1.95” 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

Geometry diagram unavailable

The drawing needs wheelbase, reach, stack and bottom bracket drop / Bottom bracket height, which the manufacturer did not publish. Available facts remain in the table.

Size

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Top tube lengthmm	496
Seat tube lengthmm	305
Head tube lengthmm	145
Head tube angle	71°
Seat tube angle	73°
Chainstay lengthmm	410

Not published by the manufacturer: Reach, Stack, Wheelbase, Front center, Bottom bracket drop, Bottom bracket height, Standover height, Fork rake, Trail, Stack/reach ratio, 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: Hardtail
Front travel: 80 mm

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 22
Largest chainring: 42
Rear sprockets: 7
Smallest sprocket: 14
Largest sprocket: 28
Lowest gear: 18.9 in
Highest gear: 72.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Shifting: Mechanical

Additional specifications

Tire width: 1.95″
Wheel material: Aluminum
Wheel size: 24″

Technical analysis

2 measures

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

Lowest gear

18.9 gear inches

This value is within the central range for this class.

Cohort: Youth / Mountain youth Model year: 2021
Sample: 230 bicycles with this information
Coverage: 72.3% of the class

Highest gear

72.0 gear inches

This value is within the central range for this class.

Cohort: Youth / Mountain youth Model year: 2021
Sample: 230 bicycles with this information
Coverage: 72.3% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.2 km/h
Highest gear: 27.6 km/h

Total gear range 382%

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: 18.9–72.0 gear inches
Class reference (p10–p90): 15.6–80.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Youth / Mountain youth Model year: 2021
Lowest gear: 230 bicycles with this information, 72.3% of the class
Highest gear: 230 bicycles with this information, 72.3% 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 2021 builds

Differences across 2021 builds
Specification	This bicycle Megamo Open Junior	Megamo Open Junior S	Megamo Open Replica	Megamo Open Replica Lady
Frame
Intended fit	Unisex	Unisex	Unisex	womens
Drivetrain
Front chainrings	3	1	3	3
Smallest chainring	22	38	22	22
Largest chainring	42	38	42	42
Rear sprockets	7	6	7	7
Smallest sprocket	14	Not informed	14	14
Largest sprocket	28	Not informed	28	28
Lowest gear	18.9 in	Not informed	20.4 in	20.4 in
Highest gear	72.0 in	Not informed	78.0 in	78.0 in
Brakes
Brake type	Rim brake	Rim brake	Mechanical disc	Mechanical disc
Cockpit
Seatpost	Not informed	Rigid seatpost	Not informed	Not informed
Other specifications
Tire width	1.95″	1.95″	Not informed	Not informed
Wheel size	24″	20″	26″	26″