Opus Odyssée Essa

Name: Opus Odyssée Essa
Brand: Opus

2025 RoadGravel Manufacturer page

Suspension: Rigid
Wheels: 700c
Drivetrain: 1 × 8 40t / 11–45t
Gear range: 409%
Weight: 11 kg 24.3 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Mechanical disc

Rider height by size (cm)

Size guide

XS 156–166
SM 163–174
MD 171–182
LG 179–189
XL 185–195

Components

16 of 19 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

Aluminum frame with thru axles coupled with a carbon fork Not identified

Suspension

1 part

Fork

Carbon Tapered 1-1/4 to 1-1/8 in Not identified

Drivetrain

7 parts

Bottom bracket
- Neco
Cassette
- Shimano CS-HG300-8 8 speeds 11–45t
CS-HG300
Chain
- KMC Z8.3 8 speeds
Crankset
- Prowheel
Front derailleur

None
Rear derailleur
- Shimano Essa RD-U2000 8 speeds
RD-U2000
Shifters
- Shimano Essa
ST-U2000

Brakes

2 parts

Wheels and tires

4 parts

Cockpit and contact points

6 parts

Handlebar

Gravel handlebar w/ 16-degree flare Not identified
Headset
- FSA NO.42/48/ACB
Pedals

None
Saddle
- Opus
Seatpost
- ProMax
Stem
- ProMax

Sizes and geometry

5 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 5 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	385	395	405	415	425
Stackmm	556	575	594	612	630
Top tube lengthmm	540	560	581	602	624
Seat tube lengthmm	450	480	510	545	580
Head tube lengthmm	110	130	150	170	190
Head tube angle	71°	71°	71°	71°	71°
Seat tube angle	74.5°	74°	73.5°	73°	72.5°
Chainstay lengthmm	440	440	440	445	445
Bottom bracket dropmm	82	80	80	80	78
Bottom bracket heightmm	267	269	269	269	271
Stack/reach ratio	1.44	1.46	1.47	1.48	1.48
Suspension and parts
Crank lengthmm	165	170	170	172.5	175
Handlebar widthmm	400	420	420	440	440
Stem lengthmm	60	70	80	90	90

Not published by the manufacturer: Wheelbase, Front center, Standover 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: Carbon
Bicycle weight: 11 kg

24.3 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 40
Largest chainring: 40
Rear sprockets: 8
Smallest sprocket: 11
Largest sprocket: 45
Lowest gear: 25.8 in
Highest gear: 105.5 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Mechanical disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire clearance: Maximum tire width: 2.2″
Tire width: 50c
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

3 measures

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

Lowest gear

25.8 gear inches

This value is within the central range for this class.

Cohort: Road / Gravel Model year: 2025
Sample: 1,536 bicycles with this information
Coverage: 76.6% of the class

Highest gear

105.5 gear inches

This value is below the central range for this class.

Cohort: Road / Gravel Model year: 2025
Sample: 1,536 bicycles with this information
Coverage: 76.6% of the class

Shifting

Mechanical

688 of 1,999 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2025
Sample: 1,999 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 9.9 km/h
Highest gear: 40.4 km/h

Total gear range 409%

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: 25.8–105.5 gear inches
Class reference (p10–p90): 22.8–126.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Gravel Model year: 2025
Lowest gear: 1536 bicycles with this information, 76.6% of the class
Highest gear: 1536 bicycles with this information, 76.6% 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 2025 builds

Differences across 2025 builds
Specification	This bicycle Opus Odyssée Essa	Opus Odyssée Cues	Opus Odyssée GRX
Frame
Bicycle weight	11 kg	10.8 kg	10.6 kg
Drivetrain
Rear sprockets	8	10	12
Smallest sprocket	11	11	10
Largest sprocket	45	48	51
Lowest gear	25.8 in	24.2 in	22.8 in
Highest gear	105.5 in	105.5 in	116.0 in
Brakes
Brake type	Mechanical disc	Hydraulic disc	Hydraulic disc
Other specifications
Bottom bracket standard	Not informed	BSA	Not informed