Author Cosmic 20

Name: Author Cosmic 20
Brand: Author

2026 YouthGeneral youth Manufacturer page

Suspension: Rigid
Wheels: 20″
Gear range: 200%
Weight: 8.6 kg 19.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Rim brake

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

8 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

alloy 20" Not identified

Suspension

1 part

Fork

hi-ten 20" Not identified

Drivetrain

5 parts

Cassette
- Shimano Tourney TZ MF-TZ510-6 6 speeds
MF-TZ510
Chain
- KMC Z6 6 speeds
Crankset
- Prowheel
Rear derailleur
- Shimano Tourney RD-TY200 7 speeds
RD-TY200
Shifters
- Shimano

Brakes

1 part

Brakes
- Tektro

Wheels and tires

5 parts

Front hub

QUANDO, 20 holes Not identified
Rear hub

QUANDO, 20 holes Not identified
Rims

alloy, 20 holes Not identified
Spokes

black stainless steel 1.8 mm Not identified
Tires
- Kenda Small Block Eight

Cockpit and contact points

5 parts

Handlebar

combo alloy, rise 20 mm, 540 mm Not identified
Pedals

plastic Not identified
Saddle
- Author
Seatpost

alloy (27.2) Not identified
Stem

combo alloy 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 10"

Table

Reach 317mm

Stack 388mm

Wheelbase 836mm

Head angle 72.0°

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 Reported by the manufacturer

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Reachmm	317
Stackmm	388
Top tube lengthmm	435
Seat tube lengthmm	254
Head tube lengthmm	90
Head tube angle	72°
Seat tube angle	73°
Chainstay lengthmm	360
Wheelbasemm	836
Front centermm	476
Bottom bracket dropmm	10
Fork rakemm	35
Stack/reach ratio	1.22

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: Steel
Bicycle weight: 8.6 kg

19.0 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 36
Largest chainring: 36
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: 1.5″
Wheel material: Aluminum
Wheel size: 20″

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.