Opus Quartier 7

Name: Opus Quartier 7
Brand: Opus

2026 UrbanFitness Manufacturer page

Suspension: Rigid
Wheels: 650b
Drivetrain: 1 × 7 36t / 12–32t
Gear range: 267%
Weight: 13.2 kg 29.1 lb · Reference configuration not specified
Brakes: Mechanical disc

Rider height by size (cm)

Size guide

SM 158–170
MD 168–179
LG 176–187

Components

13 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

Low step-through frame for everyone to enjoy Not identified

Suspension

1 part

Fork

Meta 10 Aluminum Not identified

Drivetrain

7 parts

Bottom bracket

BB-73 BSA Not identified

BB-73
Cassette
- Shimano CS-HG200-7 7 speeds 12–32t
CS-HG200
Chain
- KMC Z7 7 speeds
Crankset

Chainway SA-C08 Not identified

SA-C08
Front derailleur

None
Rear derailleur
- Shimano Tourney RD-TY500 7 speeds
RD-TY500TY-500
Shifters
- Shimano Altus SL-M315
SL-M315

Brakes

2 parts

Brake levers
- Tektro
CL-525
Brakes
- Tektro
MD-U310

Wheels and tires

4 parts

Front hub
- Joytech
Rear hub
- Joytech
Rims

DW-002 650b Not identified

DW-002
Tires
- Kenda Kwick

Cockpit and contact points

6 parts

Handlebar

MJ HB-T321 Not identified

HB-T321
Headset
- FSA NO.42/48/ACB
Pedals

FPD NW-99K Not identified

NW-99K
Saddle
- Opus
Seatpost
- Opus
Stem
- Opus

Sizes and geometry

3 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Geometry diagram unavailable

The drawing needs wheelbase, which the manufacturer did not publish. Available facts remain in the table.

Size Reported by the manufacturer

Complete manufacturer geometry table 3 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	351	366	381
Stackmm	585	613	636
Top tube lengthmm	599	626	651
Seat tube lengthmm	380	450	500
Head tube lengthmm	160	190	215
Head tube angle	69°	69°	69°
Seat tube angle	67°	67°	67°
Chainstay lengthmm	480	480	480
Bottom bracket dropmm	75	75	75
Standover heightmm	456	456	456
Stack/reach ratio	1.67	1.68	1.67
Suspension and parts
Crank lengthmm	170	170	170
Handlebar widthmm	630	630	630
Stem lengthmm	80	80	90

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
Fork material: Aluminum
Bicycle weight: 13.2 kg

29.1 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 36
Largest chainring: 36
Rear sprockets: 7
Smallest sprocket: 12
Largest sprocket: 32
Lowest gear: 30.9 in
Highest gear: 82.5 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Mechanical disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Tire width: 50c
Wheel material: Aluminum
Wheel size: 650b

Technical analysis

3 measures

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

Lowest gear

30.9 gear inches

This value is above the central range for this class.

Cohort: Urban / Fitness Model year: 2026
Sample: 145 bicycles with this information
Coverage: 78.8% of the class

Highest gear

82.5 gear inches

This value is below the central range for this class.

Cohort: Urban / Fitness Model year: 2026
Sample: 145 bicycles with this information
Coverage: 78.8% of the class

Shifting

Mechanical

5 of 184 bicycles with this information use electronic shifting.

Cohort: Urban / Fitness Model year: 2026
Sample: 184 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 11.9 km/h
Highest gear: 31.6 km/h

Total gear range 267%

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: 30.9–82.5 gear inches
Class reference (p10–p90): 22.1–126.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Urban / Fitness Model year: 2026
Lowest gear: 145 bicycles with this information, 78.8% of the class
Highest gear: 145 bicycles with this information, 78.8% 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 2026 builds
Specification	This bicycle Opus Quartier 7	Opus Quartier 8
Drivetrain
Front chainrings	1	2
Smallest chainring	36	30
Largest chainring	36	46
Rear sprockets	7	8
Smallest sprocket	12	11
Largest sprocket	32	34
Lowest gear	30.9 in	24.3 in
Highest gear	82.5 in	115.0 in
Brakes
Brake type	Mechanical disc	Hydraulic disc