Opus Curve 20

Name: Opus Curve 20
Brand: Opus

2025 YouthGeneral youth Manufacturer page

Suspension: Rigid
Wheels: 20″
Drivetrain: 1 × 7 36t / 14–34t
Gear range: 243%
Weight: 10 kg 22.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Rim brake

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

12 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

Light alloy frame and steel fork Not identified

Suspension

1 part

Fork

Steel Not identified

Drivetrain

7 parts

Brakes

2 parts

Brake levers
- Tektro
Brakes

Power Linear V-brake Not identified

Wheels and tires

4 parts

Front hub

YL-906 Not identified

YL-906
Rear hub

YL-906 Not identified

YL-906
Rims

Ace aluminum Not identified
Tires
- Kenda K-Rad

Cockpit and contact points

6 parts

Handlebar
- Opus
Headset
- VP
Pedals

Resin flat Not identified
Saddle
- Opus
Seatpost
- Opus
Stem
- Opus

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

Geometry diagram unavailable

The drawing needs wheelbase, 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
Frame
Reachmm	335
Stackmm	406
Top tube lengthmm	455
Seat tube lengthmm	308
Head tube lengthmm	100
Head tube angle	70°
Seat tube angle	73.5°
Chainstay lengthmm	370
Bottom bracket dropmm	10
Standover heightmm	526
Stack/reach ratio	1.21
Suspension and parts
Crank lengthmm	127
Handlebar widthmm	540
Stem lengthmm	40

Not published by the manufacturer: Wheelbase, Front center, Bottom bracket height, Fork rake, Trail, Front travel, Rear travel, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Steel
Bicycle weight: 10 kg

22.0 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 36
Largest chainring: 36
Rear sprockets: 7
Smallest sprocket: 14
Largest sprocket: 34
Lowest gear: 21.2 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: 1.95″
Wheel material: Aluminum
Wheel size: 20″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 8.1 km/h
Highest gear: 19.7 km/h

Total gear range 243%

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: 21.2–51.4 gear inches

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 Opus Curve 20	Opus Curve 12	Opus Curve 14	Opus Curve 16	Opus Curve 24
Frame
Frame material	Aluminum	Steel	Steel	Aluminum	Aluminum
Bicycle weight	10 kg	7.26 kg	8.16 kg	8.2 kg	10.5 kg
Drivetrain
Smallest chainring	36	28	28	28	36
Largest chainring	36	28	28	28	36
Rear sprockets	7	Not informed	Not informed	Not informed	7
Smallest sprocket	14	Not informed	Not informed	Not informed	14
Largest sprocket	34	Not informed	Not informed	Not informed	34
Lowest gear	21.2 in	Not informed	Not informed	Not informed	25.4 in
Highest gear	51.4 in	Not informed	Not informed	Not informed	61.7 in
Brakes
Brake type	Rim brake	Coaster brake	Coaster brake	Rim brake	Rim brake
Other specifications
Tire width	1.95″	2.125″	Not informed	Not informed	1.95″
Wheel size	20″	12″	14″	16″	24″